OUTDOOR SYSTEMS INC
8-K, 1999-06-03
ADVERTISING
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  -------------

                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


Date of Report (Date of earliest event reported) JUNE 3, 1999 (MAY 27, 1999)


                              OUTDOOR SYSTEMS, INC.
               (Exact Name of Registrant as Specified in Charter)

<TABLE>
<CAPTION>
<S>                                                  <C>                                <C>
         DELAWARE                                    1-3275                             86-0736400
(State or Other Jurisdiction                         (Commission                        (IRS Employer
     of Incorporation)                               File Number)                       Identification No.)
</TABLE>


 2502 NORTH BLACK CANYON HIGHWAY, PHOENIX, ARIZONA                       85009
(Address of Principal Executive Offices)                             (Zip Code)



Registrant's telephone number, including area code               (602) 246-9569



                                 NOT APPLICABLE
          (Former Name or Former Address, if Changed Since Last Report)
<PAGE>   2
ITEM 5.           OTHER EVENTS.

         On May 27, 1999, the Registrant entered into an Agreement and Plan of
Merger (the "Merger Agreement") with Infinity Broadcasting Corporation
("Infinity") and Burma Acquisition Corp., a wholly-owned subsidiary of Infinity
("Subsidiary"). The Merger Agreement provides for the acquisition of the
Registrant by Infinity pursuant to the merger (the "Merger") of Subsidiary with
and into the Registrant, with the Registrant surviving the Merger and becoming a
wholly-owned subsidiary of Infinity.

         The Merger Agreement provides that in the Merger each share of the
Registrant's common stock ("OSI Common Stock") issued and outstanding
immediately prior to the effective time of the Merger (other than treasury
shares and Infinity-owned shares that are to be cancelled) shall be converted
into the right to receive 1.25 fully paid and non-assessable shares of Infinity
Class A common stock ("Infinity Class A Common Stock") and cash in lieu of
fractional shares (all such shares of Infinity Class A Common Stock to be
issued, together with any cash in lieu of fractional shares of Infinity Class A
Common Stock, being referred to as the "Merger Consideration"). Each holder of a
certificate previously evidencing any such shares shall cease to have any rights
with respect thereto, except the right to receive, upon the surrender of such
certificates, the Merger Consideration with respect to the shares previously
evidenced by such certificate.

         Pursuant to the Merger Agreement, at the effective time of the Merger,
each outstanding stock option of the Registrant will be adjusted to be
exercisable to purchase or, with respect to incentive stock awards, payable in,
that number of shares of Infinity Class A Common Stock that is 1.25 times the
aggregate number of shares of OSI Common Stock for which such stock option was
exercisable or payable and the per share exercise price of stock options of the
Registrant shall be the exercise price immediately prior to the effective time
of the Merger divided by 1.25. Except for these adjustments, each outstanding
stock option and incentive stock award of the Registrant will continue to have,
and be subject to, the same terms and conditions such stock option was subject
to immediately prior to the effective time of the Merger.

         Concurrently with the execution of the Merger Agreement, certain major
stockholders of the Registrant entered into a Stockholders Agreement (the
"Stockholders Agreement") with Infinity pursuant to which they agreed to vote an
aggregate of 48,310,199 shares of OSI Common Stock, representing approximately
26% of the issued and outstanding shares of OSI Common Stock, in favor of the
transactions contemplated by the Merger Agreement. These major stockholders of
the Registrant are (i) William S. Levine, Chairman of the Board of the
Registrant, (ii) Levine Investments Limited Partnership, a limited partnership
of which Mr. Levine is the sole general partner, (iii) Arturo R. Moreno,
President and Chief Executive Officer of the Registrant, (iv) Carole D. Moreno,
spouse of Mr. Moreno who holds certain shares of OSI Common Stock in joint
tenancy with Mr. Moreno, and (v) BRN Properties Limited Partnership, a limited
partnership of which Mr. Moreno is the sole general partner (collectively, the
"Major Stockholders").

         Also concurrently with the execution of the Merger Agreement, CBS
Broadcasting, Inc. ("CBS") entered into a Voting Agreement (the "Voting
Agreement") with Infinity pursuant to





                                      -2-
<PAGE>   3
which CBS agreed to vote all of its shares of Infinity Class B common stock
("Infinity Class B Common Stock") in favor of the transactions contemplated by
the Merger Agreement. CBS beneficially owns 100% of Infinity's Class B Common
Stock, representing approximately 82% of Infinity's equity ownership and
approximately 96% of the combined voting power of the Infinity Class A Common
Stock and Infinity Class B Common Stock.

         Pursuant to the Merger Agreement, Infinity has agreed to enter into a
Registration Rights Agreement (the "Registration Rights Agreement") with the
Major Stockholders. The Registration Rights Agreement provides for certain
registration rights with respect to the shares of Infinity Class A Common Stock
to be issued in the Merger to the Major Stockholders.

         The consummation of the transactions contemplated by the Merger
Agreement is subject to certain conditions, including approval of the Merger
Agreement and the Merger by the stockholders of the Registrant and expiration or
early termination of the applicable waiting period under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended.

         Copies of the Merger Agreement, Stockholders Agreement, Voting
Agreement and form of Registration Rights Agreement are attached hereto as
Exhibit 99.1, Exhibit 99.2, Exhibit 99.3 and Exhibit 99.4, respectively, and are
incorporated by reference herein. The foregoing discussion does not purport to
be complete and is qualified in its entirety by reference to the Merger
Agreement, Stockholders Agreement, Voting Agreement and form of Registration
Rights Agreement, respectively.




                                      -3-
<PAGE>   4
ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

         (c) Exhibits

                  99.1     Agreement and Plan of Merger, dated as of May 27,
                           1999, among Infinity Broadcasting Corporation,
                           Outdoor Systems, Inc. and Burma Acquisition Corp.
                           Exhibit 99.1 contains a list briefly identifying the
                           contents of Schedules and Exhibits, some of which
                           have been omitted. The Registrant agrees to furnish
                           supplementally a copy of any omitted Schedule or
                           Exhibit to the Securities and Exchange Commission
                           upon request.

                  99.2     Stockholders Agreement, dated as of May 27, 1999,
                           among Infinity Broadcasting Corporation, William S.
                           Levine, Arturo R. Moreno, Carole D. Moreno, Levine
                           Investments Limited Partnership and BRN Properties
                           Limited Partnership.

                  99.3     Voting Agreement, dated as of May 27, 1999, between
                           Outdoor Systems, Inc. and CBS Broadcasting, Inc.

                  99.4     Form of Registration Rights Agreement.

                  99.5     Text of Press Release dated May 27, 1999.

                  99.6     Text of Press Release dated May 27, 1999.



                                      -4-
<PAGE>   5
                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                        OUTDOOR SYSTEMS, INC.


Date:  June 1, 1999                     By:      /s/ Bill M. Beverage
                                            -----------------------------------
                                        Bill M. Beverage
                                        Chief Financial Officer,
                                        Treasurer and Secretary













                                      -5-
<PAGE>   6
                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
EXHIBIT
NUMBER   DESCRIPTION
- ------   -----------
<S>      <C>
99.1     Agreement and Plan of Merger, dated as of May 27, 1999, among Infinity
         Broadcasting Corporation, Outdoor Systems, Inc. and Burma Acquisition
         Corp. Exhibit 99.1 contains a list briefly identifying the contents of
         Schedules and Exhibits, some of which have been omitted. The Registrant
         agrees to furnish supplementally a copy of any omitted Schedule or
         Exhibit to the Securities and Exchange Commission upon request.

99.2     Stockholders Agreement, dated as of May 27, 1999, among Infinity
         Broadcasting Corporation, William S. Levine, Arturo R. Moreno, Carole
         D. Moreno, Levine Investments Limited Partnership and BRN Properties
         Limited Partnership

99.3     Voting Agreement, dated as of May 27, 1999, between Outdoor Systems,
         Inc. and CBS Broadcasting, Inc.

99.4     Form of Registration Rights Agreement.

99.5     Text of Press Release dated May 27, 1999.

99.6     Text of Press Release dated May 27, 1999.
</TABLE>




                                      -6-

<PAGE>   1
                                                                    EXHIBIT 99.1


================================================================================




                          AGREEMENT AND PLAN OF MERGER

                                      AMONG

                       INFINITY BROADCASTING CORPORATION,

                             BURMA ACQUISITION CORP.

                                       AND

                              OUTDOOR SYSTEMS, INC.




================================================================================
<PAGE>   2
                                TABLE OF CONTENTS


                                                                            PAGE

Article 1      THE MERGER......................................................2

      1.1   The Merger.........................................................2

      1.2   Effective Time.....................................................2

      1.3   Closing of the Merger..............................................2

      1.4   Effects of the Merger..............................................2

      1.5   Certificate of Incorporation and Bylaws of the Surviving
            Corporation........................................................2

      1.6   Directors of the Surviving Corporation.............................2

      1.7   Officers of the Surviving Corporation..............................3

Article 2      CONVERSION OF SHARES; MERGER CONSIDERATION......................3

      2.1   Conversion of Shares...............................................3

      2.2   Exchange Fund......................................................4

      2.3   Stock Options......................................................6

Article 3      REPRESENTATIONS AND WARRANTIES OF OSI...........................7

      3.1   Organization and Qualification; Subsidiaries.......................7

      3.2   Capitalization of OSI and Its Subsidiaries.........................8

      3.3   Authority Relative to This Agreement...............................9

      3.4   SEC Reports; Financial Statements; No Undisclosed
            Liabilities........................................................9

      3.5   Information Supplied..............................................10

      3.6   Consents and Approvals; No Violations.............................11

      3.7   No Default........................................................12

      3.8   Absence of Changes................................................12

      3.9   Litigation........................................................14

      3.10  Compliance with Applicable Law....................................14

      3.11  Employee Plans....................................................15

      3.12  Labor and Employment Matters......................................16

      3.13  Environmental Matters.............................................17

      3.14  Taxes.............................................................20

      3.15  Material Contracts................................................21

      3.16  Insurance.........................................................23

      3.17  Real Property.....................................................23


                                        i
<PAGE>   3
                                TABLE OF CONTENTS
                                   (CONTINUED)

                                                                            PAGE

      3.18  Tangible Property.................................................24

      3.19  Intellectual Property.............................................24

      3.20  Year 2000.........................................................24

      3.21  Absence of Questionable Payments..................................25

      3.22  Opinion of Financial Advisor......................................25

      3.23  Brokers...........................................................25

      3.24  Takeover Statutes; Dissenters' Rights.............................25

Article 4      REPRESENTATIONS AND WARRANTIES OF INFINITY AND BURMA
               ACQUISITION....................................................26

      4.1   Organization and Qualification....................................26

      4.2   Capitalization of Infinity and Its Subsidiaries...................26

      4.3   Authority Relative to This Agreement..............................27

      4.4   SEC Reports; Financial Statements; No Undisclosed
            Liabilities.......................................................28

      4.5   Information Supplied..............................................28

      4.6   Consents and Approvals; No Violations.............................29

      4.7   No Default........................................................29

      4.8   Absence of Changes................................................30

      4.9   Litigation........................................................30

      4.10  Compliance with Applicable Law....................................31

      4.11  Employee Plans....................................................31

      4.12  Taxes.............................................................32

      4.13  No Prior Activities...............................................33

      4.14  Absence of Questionable Payments..................................33

      4.15  Brokers...........................................................33

      4.16  Contracts.........................................................33

Article 5      COVENANTS......................................................34

      5.1   Conduct of Business of OSI........................................34

      5.2   Conduct of Business of Infinity...................................37

      5.3   Preparation of S-4 and the Proxy Statement........................38

      5.4   Stockholder Meetings..............................................38

      5.5   No Solicitation...................................................39


                                       ii
<PAGE>   4
                                TABLE OF CONTENTS
                                   (CONTINUED)

                                                                            PAGE

      5.6   Letters of Accountants............................................41

      5.7   Access to Information.............................................41

      5.8   Additional Agreements; Reasonable Best Efforts....................42

      5.9   Regulatory Reviews................................................43

      5.10  Public Announcements..............................................43

      5.11  Indemnification; Directors' and Officers' Insurance...............43

      5.12  Notification of Certain Matters...................................45

      5.13  Tax-Free Reorganization Treatment.................................46

      5.14  OSI Affiliates....................................................46

      5.15  SEC Filings.......................................................46

      5.16  Employee Benefits.................................................46

      5.17  Registration Rights...............................................47

      5.18  Infinity Board of Directors.......................................47

      5.19  Fees and Expenses.................................................47

      5.20  Antitakeover Statutes.............................................47

      5.21  OSI Board of Directors............................................47

      5.22  FIRPTA Certificate................................................48

Article 6      CONDITIONS TO CONSUMMATION OF THE MERGER.......................48

      6.1   Conditions to Each Party's Obligations to Effect the Merger.......48

      6.2   Conditions to the Obligations of OSI..............................49

      6.3   Conditions to the Obligations of Infinity and Burma
            Acquisition.......................................................50

Article 7      TERMINATION; AMENDMENT; WAIVER.................................51

      7.1   Termination by Mutual Agreement...................................51

      7.2   Termination by Either Infinity or OSI.............................51

      7.3   Termination by OSI................................................52

      7.4   Termination by Infinity...........................................53

      7.5   Effect of Termination and Abandonment.............................53

      7.6   Amendment.........................................................55

      7.7   Extension; Waiver.................................................55


                                       iii
<PAGE>   5
                                TABLE OF CONTENTS
                                   (CONTINUED)

                                                                            PAGE

Article 8      MISCELLANEOUS..................................................55

      8.1   Nonsurvival of Representations and Warranties.....................55

      8.2   Entire Agreement; Assignment......................................56

      8.3   Notices...........................................................56

      8.4   Governing Law.....................................................57

      8.5   Descriptive Headings..............................................57

      8.6   Parties in Interest...............................................57

      8.7   Severability......................................................57

      8.8   Specific Performance..............................................57

      8.9   Brokers...........................................................57

      8.10  Counterparts......................................................57

      8.11  Interpretation....................................................58



Exhibits

Exhibit A   Stockholders Agreement
Exhibit B   Infinity Voting Agreement
Exhibit C   Form of Registration Rights Agreement


                                       iv
<PAGE>   6
                            GLOSSARY OF DEFINED TERMS

Defined Terms                                                            Page(s)
- -------------                                                            -------

Acquisition Proposal..........................................................41
Agreement......................................................................1
Burma Acquisition..............................................................1
Canada Act....................................................................11
CERCLA........................................................................18
Certificate....................................................................3
Change of Control Transaction.................................................55
CIBC Credit Documents.........................................................11
Class B Common Stock..........................................................26
Closing........................................................................2
Closing Date...................................................................2
Code...........................................................................1
Computer Programs.............................................................24
Confidentiality Agreement.....................................................42
Covered Transactions..........................................................25
Current Premium...............................................................44
DGCL...........................................................................2
Effective Time.................................................................2
Environmental Costs and Liabilities...........................................17
Environmental Law.............................................................18
ERISA.........................................................................15
Exchange Act..................................................................10
Exchange Agent.................................................................4
Exchange Fund..................................................................4
Exchange Ratio.................................................................3
Expenses......................................................................47
Fee...........................................................................54
Filed OSI SEC Reports.........................................................10
GAAP..........................................................................10
Government Entity.............................................................11
Hazardous Material............................................................18
HSR Act.......................................................................11
Indemnified Parties...........................................................44
Infinity.......................................................................1
Infinity Affiliate............................................................54
Infinity Affiliates...........................................................54
Infinity Closing Certificate..................................................49
Infinity Common Stock..........................................................1
Infinity Disclosure Schedule...................................................3
Infinity Employee Benefit Plan................................................31
Infinity Permits..............................................................31


                                        i
<PAGE>   7
Infinity Preferred Stock......................................................26
Infinity Required Approvals...................................................29
Infinity Requisite Vote.......................................................27
Infinity SEC Reports..........................................................28
Infinity Securities...........................................................27
Infinity Voting Agreement......................................................1
Information Statement.........................................................29
know..........................................................................58
knowledge.....................................................................58
Law...........................................................................11
Letter of Transmittal..........................................................4
Lien...........................................................................9
Material Adverse Effect.......................................................58
Material Contracts............................................................22
Merger.........................................................................2
Merger Consideration...........................................................3
Notice........................................................................52
NYSE..........................................................................29
OSHA..........................................................................18
OSI............................................................................1
OSI Affiliate.................................................................46
OSI Board......................................................................9
OSI Closing Certificate.......................................................50
OSI Common Stock...............................................................1
OSI Disclosure Schedule........................................................7
OSI Employee Benefit Plan.....................................................15
OSI Employee Benefit Plans................................................15, 31
OSI Financial Advisor.........................................................25
OSI Indentures................................................................12
OSI Option Plans...............................................................8
OSI Permits...................................................................14
OSI Required Approvals........................................................11
OSI Requisite Vote.............................................................9
OSI SEC Reports...............................................................10
OSI Securities.................................................................8
OSI Stock Options..............................................................8
OSI Stockholders Meeting......................................................38
Permitted Liens...............................................................23
Proxy Statement...............................................................11
Real Property Leases..........................................................23
Real Property Rights..................................................3.15(b) 22
Release.......................................................................18
Remedial Action...............................................................18
S-4...........................................................................10
SEC............................................................................9


                                       ii
<PAGE>   8
Securities Act................................................................10
Share..........................................................................3
Share Issuance................................................................27
Sign Partnerships..............................................................7
Standstill Period.............................................................54
Stockholders Agreement.........................................................1
subsidiary.....................................................................7
Superior Proposal.............................................................40
Surviving Corporation..........................................................2
Takeover Statutes.............................................................25
Tax Returns...................................................................21
Taxes.........................................................................21
Termination Date..............................................................51


                                       iii
<PAGE>   9
                          AGREEMENT AND PLAN OF MERGER

            THIS AGREEMENT AND PLAN OF MERGER, dated as of May 27, 1999 (the
"Agreement"), is among INFINITY BROADCASTING CORPORATION, a Delaware corporation
("Infinity"), BURMA ACQUISITION CORP. ("Burma Acquisition"), a Delaware
corporation and a direct wholly owned subsidiary of Infinity, and OUTDOOR
SYSTEMS, INC., a Delaware corporation ("OSI").

            WHEREAS, the Boards of Directors of OSI, Infinity and Burma
Acquisition each have determined that the Merger (as defined in Section 1.1) is
advisable and fair to, and in the best interests of, their respective
stockholders and have approved the Merger in accordance with this Agreement;

            WHEREAS, for federal income Tax (as defined in Section 3.14)
purposes, it is intended that the Merger shall qualify as a Tax-free
reorganization within the meaning of Section 368(a) of the Internal Revenue Code
of 1986, as amended (the "Code");

            WHEREAS, concurrently with the execution hereof, certain holders of
shares of Common Stock, par value $.01 per share, of OSI ("OSI Common Stock")
are entering into an agreement providing for certain matters with respect to
their shares of OSI Common Stock (the "Stockholders Agreement"), a copy of which
is attached hereto as Exhibit A;

            WHEREAS, the Board of Directors of OSI has approved the terms of
the Stockholders Agreement; and

            WHEREAS, concurrently with the execution hereof, the controlling
stockholder of Infinity, CBS Broadcasting, Inc., is entering into an agreement
to vote in favor of the issuance of shares of Class A Common Stock, par value
$.01 per share, of Infinity ("Infinity Common Stock") in connection with the
Merger (the "Infinity Voting Agreement"), a copy of which is attached hereto as
Exhibit B.

            WHEREAS, Infinity, Burma Acquisition and OSI desire to make certain
representations, warranties, covenants and agreements in connection with the
Merger and also to prescribe various conditions to the Merger.

            NOW, THEREFORE, in consideration of the premises and the mutual
representations, warranties, covenants and agreements herein contained,
Infinity, Burma Acquisition and OSI hereby agree as follows:
<PAGE>   10
                                    ARTICLE 1

                                   THE MERGER

      1.1 The Merger. At the Effective Time (as defined in Section 1.2), upon
the terms and subject to the conditions of this Agreement and in accordance with
the Delaware General Corporation Law (the "DGCL"), Burma Acquisition shall be
merged with and into OSI (the "Merger"). Following the Merger, OSI shall
continue as the surviving corporation (the "Surviving Corporation") and shall
continue its corporate existence under the DGCL, and the separate corporate
existence of Burma Acquisition shall cease.

      1.2 Effective Time. Subject to the provisions of this Agreement, Infinity,
Burma Acquisition and OSI shall cause the Merger to be consummated by filing a
certificate of merger complying with the DGCL with the Secretary of State of the
State of Delaware as soon as practicable on or after the Closing Date (as
defined in Section 1.3). The Merger shall become effective upon the later of
such filing or at such time thereafter as is provided in such certificate of
merger (the "Effective Time").

      1.3 Closing of the Merger. The closing of the Merger (the "Closing") will
take place at a time and on a date (the "Closing Date") to be specified by the
parties, which shall be no later than the second business day after satisfaction
or waiver of the conditions set forth in Article 6 (other than those conditions
that by their nature are to be satisfied at the Closing, but subject to the
fulfillment or waiver of those conditions), at the offices of Weil, Gotshal &
Manges LLP, 767 Fifth Avenue, New York, New York 10153, unless another time,
date or place is agreed to in writing by the parties hereto.

      1.4 Effects of the Merger. The Merger shall have the effects set forth in
the DGCL. Without limiting the generality of the foregoing, and subject thereto,
at the Effective Time, all the properties, rights, privileges, immunities,
powers and franchises of Burma Acquisition and OSI shall vest in the Surviving
Corporation, and all debts, liabilities, obligations and duties of Burma
Acquisition and OSI shall become the debts, liabilities, obligations and duties
of the Surviving Corporation.

      1.5 Certificate of Incorporation and Bylaws of the Surviving Corporation.
The Certificate of Incorporation of Burma Acquisition in effect immediately
prior to the Effective Time shall be the Certificate of Incorporation of the
Surviving Corporation, until amended in accordance with such Certificate of
Incorporation and the DGCL. The Bylaws of Burma Acquisition in effect
immediately prior to the Effective Time shall be the Bylaws of the Surviving
Corporation, until amended in accordance with such Bylaws and the DGCL.

      1.6 Directors of the Surviving Corporation. The directors of Burma
Acquisition immediately prior to the Effective Time, who are identified on
Section 1.6 of the Disclosure Schedule previously delivered by Infinity to OSI
(the "Infinity Disclosure


                                       2
<PAGE>   11
Schedule"), shall be the initial directors of the Surviving Corporation, each to
hold office in accordance with the Certificate of Incorporation and Bylaws of
the Surviving Corporation until such director's successor is duly elected or
appointed and qualified or until their earlier death, resignation or removal.

      1.7 Officers of the Surviving Corporation. The officers of Burma
Acquisition immediately prior to the Effective Time, who are identified on
Section 1.7 of the Infinity Disclosure Schedule, shall be the initial officers
of the Surviving Corporation, each to hold office in accordance with the
Certificate of Incorporation and Bylaws of the Surviving Corporation until such
officer's successor is duly elected or appointed and qualified or until their
earlier death, resignation or removal.

                                    ARTICLE 2

                   CONVERSION OF SHARES; MERGER CONSIDERATION

      2.1 Conversion of Shares. At the Effective Time, by virtue of the Merger
and without any action on the part of any of the parties hereto or their
respective stockholders:

            (a) Common Stock of Burma Acquisition. Each share of common stock,
par value $.01 per share, of Burma Acquisition issued and outstanding
immediately prior to the Effective Time shall be converted into one fully paid
and non-assessable share of common stock, par value $.01 per share, of the
Surviving Corporation.

            (b) Common Stock of OSI. Each share of OSI Common Stock issued and
outstanding immediately prior to the Effective Time (each, a "Share"), other
than Shares to be cancelled in accordance with Section 2.1(c), shall be
converted into the right to receive 1.25 fully paid and non-assessable shares
(the "Exchange Ratio") of Infinity Common Stock (all such shares of Infinity
Common Stock issued, together with any cash in lieu of fractional shares of
Infinity Common Stock to be paid pursuant to Section 2.2(f), being referred to
as the "Merger Consideration"), and shall cease to be outstanding and shall
automatically be canceled and shall cease to exist, and each holder of a
certificate previously evidencing any such Shares (each, a "Certificate") shall
cease to have any rights with respect thereto, except the right to receive, upon
the surrender of such Certificate in accordance with the provisions of Section
2.2, the Merger Consideration with respect to the Shares previously evidenced by
such Certificate.

            (c) Cancellation of Treasury Shares and Infinity-Owned Shares. Each
Share that is owned by OSI, Infinity or Burma Acquisition shall automatically be
cancelled and shall cease to exist, and no consideration shall be delivered or
deliverable in exchange therefor.


                                       3
<PAGE>   12
      2.2 Exchange Fund.

            (a) Letter of Transmittal . As soon as reasonably practicable after
the Effective Time, a bank or trust company to be designated by Infinity (the
"Exchange Agent") shall mail to each holder of record of Shares immediately
prior to the Effective Time (excluding any Shares to be cancelled pursuant to
Section 2.1(c)) (i) a letter of transmittal (the "Letter of Transmittal") which
shall specify that delivery shall be effected, and risk of loss and title to the
Certificates shall pass, only upon delivery of such Certificates to the Exchange
Agent and shall be in such form and have such other provisions as Infinity shall
reasonably specify and (ii) instructions for use in effecting the surrender of
the Certificates in exchange for the Merger Consideration with respect to the
Shares formerly represented thereby.

            (b) Deposit of Merger Consideration. Promptly after the Effective
Time, Infinity shall deposit with the Exchange Agent, for the benefit of the
holders of Shares for exchange in accordance with this Article 2, certificates
or other evidence representing the shares of Infinity Common Stock issuable
pursuant to Section 2.1(b). Infinity agrees to make available to the Exchange
Agent from time to time as needed, cash sufficient to pay cash in lieu of
fractional shares pursuant to Section 2.2(f) and any dividends or other
distributions pursuant to Section 2.2(e). Any cash and certificates or other
evidence representing shares of Infinity Common Stock deposited with the
Exchange Agent shall hereinafter be referred to as the "Exchange Fund."

            (c) Surrender of Certificates. Upon surrender of a Certificate to
the Exchange Agent, together with the Letter of Transmittal, duly executed, and
such other documents as Infinity or the Exchange Agent shall reasonably request,
the holder of such Certificate shall be entitled to receive in exchange
therefor, (i) certificates or other evidence representing the number of whole
shares of Infinity Common Stock which such Holder has the right to receive
pursuant to Section 2.1(b), (ii) any cash in lieu of fractional shares of
Infinity Common Stock pursuant to Section 2.2(f) and (iii) any dividends or
other distributions pursuant to Section 2.2(e) (in each case without interest
and less the amount of any required withholding Taxes, if any, in accordance
with Section 2.2(i)).

            (d) Rules Governing Exchange. Infinity, in consultation with OSI
prior to the Effective Time, shall have the right to make reasonable rules, not
inconsistent with the terms of this Agreement, governing the issuance and
delivery of certificates for, or other evidence of, shares of Infinity Common
Stock.

            (e) Distributions With Respect to Unexchanged Shares of Infinity
Common Stock. The shares of Infinity Common Stock issuable pursuant to Section
2.1(b) shall be deemed to have been issued at the Effective Time for purposes of
entitlement to dividends or other distributions declared, if any, after the
Effective Time. No dividends or other distributions with respect to shares of
Infinity Common Stock with a record date after the Effective Time shall be paid
to the holder of any unsurrendered


                                       4
<PAGE>   13
Certificate with respect to the shares of Infinity Common Stock such holder is
entitled to receive until such Certificate is surrendered by such holder.

            (f) Fractional Shares. No scrip or fractional share certificate for
Infinity Common Stock will be issued upon the surrender of Certificates, and an
outstanding fractional share interest will not entitle the owner thereof to
vote, to receive dividends or to any rights of a stockholder of Infinity with
respect to such fractional share interest. In lieu of the issuance of fractional
shares, Infinity shall pay to the Exchange Agent an amount sufficient for the
Exchange Agent to pay each holder of Shares an amount in cash equal to the
product obtained by multiplying (i) the fractional share interest to which such
holder would otherwise be entitled (after taking into account all Shares held at
the Effective Time by such holder) by (ii) the closing price for a share of
Infinity Common Stock on the NYSE Composite Transaction Tape on the first
trading day immediately following the Effective Time.

            (g) Termination of Exchange Fund. Any portion of the Exchange Fund
which remains undistributed to the former holders of Shares for six (6) months
after the Effective Time shall be delivered to Infinity, upon demand, and any
former holders of Shares who have not theretofore complied with this Article 2
shall thereafter look only to Infinity for the Merger Consideration to which
they are entitled pursuant to this Article 2.

            (h) No Liability. None of Infinity, Burma Acquisition, OSI or the
Surviving Corporation shall be liable to any former holder of Shares for any
Merger Consideration from the Exchange Fund delivered to a public official
pursuant to any applicable abandoned property, escheat or similar Law (as
defined in Section 3.6).

            (i) Withholding Rights. Infinity, the Surviving Corporation and the
Exchange Agent shall be entitled to deduct and withhold, from the consideration
otherwise payable pursuant to this Agreement to any former holder of Shares,
such amounts as Infinity, the Surviving Corporation, OSI (or any subsidiary
thereof) or the Exchange Agent is required to deduct and withhold with respect
to the making of such payment under the Code or any provision of state, local or
foreign Tax Law. To the extent that amounts are so withheld by Infinity, the
Surviving Corporation or the Exchange Agent, such withheld amounts shall be
treated for all purposes of this Agreement as having been paid to the former
holder of the Shares in respect of which such deduction and withholding was made
by Infinity, the Surviving Corporation or the Exchange Agent.

            (j) Lost Certificates. If any Certificate shall have been lost,
stolen or destroyed, upon the making of an affidavit of that fact by the person
claiming such Certificate to be lost, stolen or destroyed and, if required by
the Surviving Corporation, the posting by such person of a bond in such
reasonable amount as the Surviving Corporation may direct as indemnity against
any claim that may be made against it with respect to such Certificate, the
Exchange Agent will deliver in exchange for such lost, stolen or destroyed
Certificate the applicable Merger Consideration with respect to the


                                       5
<PAGE>   14
Shares formerly represented thereby and any unpaid dividends and distributions
on shares of Infinity Common Stock deliverable in respect thereof pursuant to
Section 2.2(e).

            (k) Stock Transfer Books. The stock transfer books of OSI shall be
closed immediately upon the Effective Time and there shall be no further
registration of transfers of Shares thereafter on the records of OSI.

            (l) Affiliates. Notwithstanding anything to the contrary herein, no
shares of Infinity Common Stock or cash shall be delivered to a person who may
be deemed an OSI Affiliate in accordance with Section 5.14, until such person
has executed and delivered to Infinity the written agreement contemplated by
Section 5.14.

      2.3 Stock Options.

            (a) Infinity and OSI shall take such actions as are necessary to
provide that at the Effective Time each outstanding OSI Stock Option (as defined
in Section 3.2(a)) shall be adjusted in accordance with the terms thereof to be
exercisable to purchase or, with respect to incentive stock awards, payable in,
shares of Infinity Common Stock, as provided below. Following the Effective
Time, each OSI Stock Option shall continue to have, and shall be subject to, the
same terms and conditions (including transfer restrictions) set forth in the OSI
Option Plans (as defined in Section 3.2(a)) or any other agreement pursuant to
which such OSI Stock Option was subject immediately prior to the Effective Time,
except that (i) each OSI Stock Option shall be exercisable or payable for that
number of shares of Infinity Common Stock equal to the product of (x) the
aggregate number of shares of OSI Common Stock for which such OSI Stock Option
was exercisable or payable and (y) the Exchange Ratio, rounded up to the nearest
whole share, if necessary, and (ii) except with respect to incentive stock
awards, which have no exercise price, the per share exercise price of such OSI
Stock Option shall be the exercise price immediately prior to the Effective Time
divided by the Exchange Ratio (rounded up to the nearest whole cent). The
adjustments provided herein to any options which are incentive stock options (as
defined in Section 422 of the Code) shall be effected in a manner consistent
with Section 424(a) of the Code.

            (b) As soon as practicable after the Effective Time, Infinity shall
deliver to the holders of OSI Stock Options appropriate notices setting forth
such holders' rights pursuant to the respective OSI Option Plans and the
agreements evidencing the grants of such OSI Stock Options and that such OSI
Stock Options and agreements shall continue in effect on the same terms and
conditions (subject to the adjustments required by this Section 2.3) after
giving effect to the Merger and the provisions set forth above. Infinity shall
comply with the terms of the OSI Option Plans.

            (c) Infinity shall take all corporate action necessary to reserve
for issuance a sufficient number of shares of Infinity Common Stock for delivery
upon exercise of OSI Stock Options. Infinity shall file a registration statement
on Form S-8 as of or prior to the Effective Time with respect to the shares of
Infinity Common Stock subject to OSI Stock Options and shall use commercially
reasonable efforts to maintain the effectiveness


                                       6
<PAGE>   15
of such registration statement (and maintain the current status of the
prospectus or prospectuses contained therein) for so long as such options remain
outstanding.

                                    ARTICLE 3

                      REPRESENTATIONS AND WARRANTIES OF OSI

            OSI hereby represents and warrants to each of Infinity and Burma
Acquisition as follows:

      3.1 Organization and Qualification; Subsidiaries.

            (a) OSI and each of its subsidiaries (as defined in Section 3.1(b))
is a corporation or legal entity duly organized, validly existing and in good
standing under the Laws of the jurisdiction of its incorporation or organization
and has all requisite corporate, partnership or similar power and authority to
own, lease and operate its properties and to carry on its businesses as now
conducted and proposed by OSI to be conducted, except in such jurisdictions,
where the failure to be so duly qualified and in good standing has not had and
would not, individually or in the aggregate, reasonably be expected to have a
Material Adverse Effect (as defined in Section 8.11(d)) on OSI.

            (b) Except as set forth in Section 3.1(b) of the Disclosure Schedule
previously delivered by OSI to Infinity (the "OSI Disclosure Schedule"), OSI has
no subsidiaries and does not own, directly or indirectly, beneficially or of
record, any shares of capital stock or other security of any other entity or any
other material investment in any other entity (excluding interests in
partnerships or joint ventures owning five (5) or fewer outdoor advertising
displays ("Sign Partnerships")). The term "subsidiary" means, when used with
reference to any entity, any corporation or other organization, whether
incorporated or unincorporated, (i) of which such party or any other subsidiary
of such party is a general or managing partner or managing member, (ii) the
outstanding voting securities or interests of which, having by their terms
ordinary voting power to elect a majority of the Board of Directors or others
performing similar functions with respect to such corporation or other
organization, are directly or indirectly owned or controlled by such party or by
any one or more of its subsidiaries, or (iii) more than fifty percent (50%) of
the value of the outstanding equity securities or interests (including
membership interests) of which are owned directly or indirectly by such party,
but excluding Sign Partnerships.

            (c) OSI and each of its subsidiaries is duly qualified and in good
standing to do business in each jurisdiction in which the property owned, leased
or operated by it or the nature of the business conducted by it makes such
qualification necessary, except in such jurisdictions where the failure to be so
duly qualified and in good standing has not had and would not reasonably be
expected to have, individually or in the aggregate, a Material Adverse Effect on
OSI.


                                       7
<PAGE>   16
            (d) OSI has heretofore delivered or made available to Infinity
accurate and complete copies of the articles or certificate of incorporation and
by-laws, or other similar organizational documents, as currently in effect, of
OSI and each of its subsidiaries.

      3.2 Capitalization of OSI and Its Subsidiaries.

            (a) The authorized capital stock of OSI consists of: (i) 600,000,000
shares of OSI Common Stock, of which, as of May 24, 1999, 184,701,675 shares
were issued and outstanding and 36,235,206 shares were held in treasury and (ii)
12,000,000 shares of Preferred Stock, par value $1.00 per share, no shares of
which are issued and outstanding. All of the issued and outstanding shares of
OSI Common Stock have been validly issued, and are fully paid, nonassessable and
free of preemptive rights. As of May 24, 1999, 23,810,486 shares of OSI Common
Stock were reserved for issuance and issuable upon or otherwise deliverable in
connection with the exercise of outstanding options and incentive stock awards
granted by OSI to purchase shares of OSI Common Stock (such options and awards
being referred to collectively as the "OSI Stock Options") issued pursuant to
the OSI stock option plans and agreements listed in Section 3.2(a) of the OSI
Disclosure Schedule (the "OSI Option Plans"). Since March 31, 1999, no shares of
OSI's capital stock have been issued other than pursuant to the exercise of OSI
Stock Options already in existence on such date and, since March 31, 1999, no
OSI Stock Options have been granted. Section 3.2(a) of the OSI Disclosure
Schedule sets forth a complete and correct list of all holders of OSI Stock
Options, including such person's name, the number of OSI Stock Options held by
such person and the exercise price for each such OSI Stock Option. Except as set
forth above in this Section 3.2(a), as of the date hereof, there are outstanding
(i) no shares of capital stock or other voting securities of OSI, (ii) no
securities of OSI or its subsidiaries convertible into or exchangeable for
shares of capital stock or voting securities of OSI, (iii) no options or other
rights to acquire from OSI or its subsidiaries, and no obligations of OSI or its
subsidiaries to issue, any capital stock, voting securities or securities
convertible into or exchangeable for capital stock or voting securities of OSI,
and (iv) no equity equivalents, or interests in the ownership or earnings, of
OSI or its subsidiaries or other similar rights (including stock appreciation
rights but excluding interests in Sign Partnerships) (collectively, "OSI
Securities"). There are no outstanding obligations of OSI or its subsidiaries to
repurchase, redeem or otherwise acquire any OSI Securities. All OSI Stock
Options, except incentive stock awards, had an exercise price equal to the fair
market value of the underlying shares of OSI Common Stock as of the date of
grant. Except as set forth in Section 3.2(a) of the OSI Disclosure Schedule,
there are no shareholder agreements, voting trusts or other agreements or
understandings to which OSI is a party or to which it is bound relating to the
voting or disposition of any shares of capital stock of OSI.

            (b) Except as set forth in Section 3.2(b) of the OSI Disclosure
Schedule, all of the outstanding capital stock of OSI's subsidiaries is owned by
OSI, directly or indirectly, free and clear of any Lien (as defined below) or
any other limitation or restriction (including any restriction on the right to
vote or sell the same, except as may be provided as a matter of Law). There are
no securities of OSI or its subsidiaries convertible into or exchangeable for,
no options or other rights to acquire from OSI or its


                                       8
<PAGE>   17
subsidiaries, and no other contract, understanding, arrangement or obligation
(whether or not contingent) providing for the issuance or sale, directly or
indirectly of, any capital stock or other ownership interests in, or any other
securities of, any subsidiary of OSI. There are no outstanding contractual
obligations of OSI or its subsidiaries to repurchase, redeem or otherwise
acquire any outstanding shares of capital stock or other ownership interests in
any subsidiary of OSI. For purposes of this Agreement, "Lien" means, with
respect to any asset (including, without limitation, any security), any
mortgage, lien, pledge, charge, security interest or encumbrance of any kind in
respect of such asset.

      3.3 Authority Relative to This Agreement.

            (a) OSI has all necessary corporate power and authority to execute
and deliver this Agreement and to consummate the transactions contemplated
hereby. The execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby and by the Stockholders' Agreement have been
duly and validly authorized and approved by the Board of Directors of OSI (the
"OSI Board") and no other corporate proceedings on the part of OSI are necessary
to authorize this Agreement or to consummate the transactions contemplated
hereby (other than, with respect to the Merger, the approval and adoption of
this Agreement by the holders of a majority of the then outstanding shares of
OSI Common Stock). This Agreement has been duly and validly executed and
delivered by OSI and constitutes a valid, legal and binding agreement of OSI,
enforceable against OSI in accordance with its terms.

            (b) The OSI Board has, by unanimous vote of those present (who
constituted 100% of the directors then in office), duly and validly approved,
and taken all corporate actions required to be taken by the OSI Board for, the
consummation of the transactions, including the Merger, contemplated hereby and
has resolved (i) to deem this Agreement and the transactions contemplated
hereby, including the Merger, taken together, advisable and fair to, and in the
best interests of, OSI and its stockholders, (ii) to recommend that the
stockholders of OSI approve and adopt this Agreement and (iii) to approve the
Stockholders Agreement.

            (c) The OSI Board has directed that this Agreement be submitted to
the stockholders of OSI for their approval at a meeting to be held for that
purpose. The affirmative vote of the holders of a majority of the voting stock
of OSI (which is comprised solely of OSI Common Stock) is the only vote of the
holders of any class or series of capital stock of OSI necessary to adopt this
Agreement and approve the transactions contemplated hereby, including the Merger
(the "OSI Requisite Vote"). No other vote of the stockholders of OSI is required
by Law, the certificate of incorporation or bylaws of OSI or otherwise in order
for OSI to approve and adopt this Agreement or to consummate the transactions
contemplated hereby.

      3.4 SEC Reports; Financial Statements; No Undisclosed Liabilities.

            (a) OSI has filed all required forms, reports and documents with the
Securities and Exchange Commission (the "SEC") since January 1, 1997 (the "OSI
SEC


                                       9
<PAGE>   18
Reports"), each of which has complied in all material respects with all
applicable requirements of the Securities Act of 1933, as amended (the
"Securities Act"), and the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), each as in effect on the dates such forms, reports and
documents were filed. None of the OSI SEC Reports, including, without
limitation, any financial statements or schedules included or incorporated by
reference therein, contained, when filed, any untrue statement of a material
fact or omitted to state a material fact required to be stated or incorporated
by reference therein or necessary in order to make the statements therein, in
light of the circumstances under which they were made, not misleading. The
consolidated financial statements of OSI included in the OSI SEC Reports
complied as to form in all material respects with applicable accounting
requirements and the published rules and regulations of the SEC with respect
thereto as in effect on the dates such OSI SEC Reports were filed, and fairly
present, in all material respects and in conformity with United States generally
accepted accounting principles ("GAAP") applied on a consistent basis (except as
may be indicated in the notes thereto), the consolidated financial position of
OSI and its consolidated subsidiaries as of the dates thereof and their
consolidated results of operations and changes in financial position for the
periods then ended (subject, in the case of the unaudited interim financial
statements, to normal year-end adjustments which are not expected to be
material).

            (b) Except as and to the extent disclosed or reflected in the OSI
SEC Reports filed prior to the date hereof (the "Filed OSI SEC Reports"),
neither OSI nor any of its subsidiaries has any liabilities or obligations of
any nature, whether or not accrued, contingent or otherwise, whether due or to
become due or asserted or unasserted, which would reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on OSI.

            (c) OSI has made available to Infinity a complete and correct copy
of any material amendments or modifications, which have not yet been filed with
the SEC, to agreements, documents or other instruments which previously had been
filed by OSI with the SEC pursuant to the Exchange Act.

      3.5 Information Supplied.

            (a) None of the information supplied or to be supplied by OSI for
inclusion or incorporation by reference in the registration statement on Form
S-4 to be filed with the SEC by Infinity in connection with the issuance of
shares of Infinity Common Stock in the Merger, including the prospectus
contained therein and any amendment thereof or supplement thereto (the "S-4"),
will, at the time the S-4 is filed with the SEC and at the time it becomes
effective under the Securities Act, contain any untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading. If, at any time prior to the Effective
Time, any event with respect to OSI, its officers and directors or any of its
subsidiaries should occur which is required to be described in the S-4 (or an
amendment or supplement thereto), OSI shall promptly so advise Infinity.


                                       10
<PAGE>   19
            (b) The proxy statement relating to the meeting of OSI's
stockholders to be held in connection with the Merger, including any amendment
thereof or supplement thereto (the "Proxy Statement"), will not, at the date
mailed to stockholders of OSI and at the time of the meeting of stockholders of
OSI to be held in connection with the Merger, contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they are made, not misleading. The Proxy Statement
will comply as to form in all material respects with the applicable provisions
of the Exchange Act and the rules and regulations thereunder.

      3.6 Consents and Approvals; No Violations. Except for filings, permits,
authorizations, consents and approvals as may be required under, and other
applicable requirements of, the Securities Act, the Exchange Act, state
securities or blue sky Laws, the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended (the "HSR Act"), the Investment Canada Act (the "Canada Act"),
the Comision Federal de Competencia of Mexico, the filing and recordation of a
certificate of merger as required by the DGCL, and as otherwise set forth in
Section 3.6 of the OSI Disclosure Schedule (collectively, the "OSI Required
Approvals"), no filing with or notice to, and no permit, authorization, consent
or approval of, any court or tribunal or administrative, governmental or
regulatory body, agency or authority (a "Governmental Entity") is necessary for
the execution and delivery by OSI of this Agreement or the consummation by OSI
of the transactions contemplated hereby, except where the failure to obtain such
permits, authorizations, consents or approvals or to make such filings or give
such notice would not reasonably be expected to have, individually or in the
aggregate, a Material Adverse Effect on OSI. Subject to obtaining the OSI
Required Approvals, neither the execution, delivery and performance of this
Agreement by OSI nor the consummation by OSI of the transactions contemplated
hereby will (i) conflict with or result in any breach of any provision of the
respective certificate or articles of incorporation or bylaws (or similar
governing documents) of OSI or any of its subsidiaries, (ii) result in a
violation or breach of, or constitute (with or without due notice or lapse of
time or both) a default (or give rise to any right of termination, amendment,
cancellation or acceleration or Lien) under, any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, lease, license, contract,
agreement or other instrument or obligation to which OSI or any of its
subsidiaries is a party or by which any of them or any of their respective
properties or assets may be bound except the CIBC Credit Documents and the OSI
Indentures (as hereinafter defined), or (iii) violate any order, writ,
injunction, decree, Law, statute, rule or regulation (a "Law") applicable to OSI
or any of its subsidiaries or any of their respective properties or assets,
except in the case of (ii) or (iii) for violations, breaches or defaults which
would not reasonably be expected to have, individually or in the aggregate, a
Material Adverse Effect on OSI. No rights of first refusal or first offer,
preemptive rights or similar rights of participation are applicable to the
transactions contemplated by this Agreement or the Stockholders Agreement.

            For the purposes of this Agreement, (i) "CIBC Credit Documents"
means the Fifth Amended and Restated Credit Agreement dated as of August 15,
1997, among


                                       11
<PAGE>   20
OSI, Mediacom, Inc., the several banks and other financial institutions thereto
and CIBC, as subsequently amended from time to time, and the notes, agreements
and other instruments referenced therein and (ii) "OSI Indentures" means the
Indentures dated October 15, 1996 and June 23, 1997, respectively, each among
OSI, its United States subsidiaries and the Bank of New York as trustee,
relating to the 9 3/8% Senior Subordinated Notes due 2006 and the 8 7/8% Senior
Subordinated Notes due 2007, including all supplements thereto.

      3.7 No Default. None of OSI or its subsidiaries is in default or violation
(and no event has occurred which with or without due notice or the lapse of time
or both would constitute a default or violation) of any term, condition or
provision of (i) its certificate or articles of incorporation or bylaws (or
similar governing documents), (ii) any note, bond, mortgage, indenture, lease,
license, contract, agreement or other instrument or obligation to which OSI or
any of its subsidiaries is now a party or by which any of them or any of their
respective properties or assets may be bound or (iii) any order, writ,
injunction, decree, Law, statute, rule or regulation applicable to OSI, its
subsidiaries or any of their respective properties or assets, except in the case
of (ii) or (iii) for violations, breaches or defaults (x) arising under the CIBC
Credit Documents or under the OSI Indentures, absent the consent of CIBC and
other lenders under the CIBC Credit Documents, from the consummation of the
transactions contemplated herein and from the obligations arising under the OSI
Indentures resulting from such consummation or (y) which do not or would not
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on OSI.

      3.8 Absence of Changes. Except as and to the extent disclosed by OSI in
the Filed OSI SEC Reports or as disclosed in Section 3.8 of the OSI Disclosure
Schedule, from January 1, 1999 through the date of this Agreement, OSI and its
subsidiaries have conducted their business in the ordinary and usual course
consistent with past practice and there has not been:

            (a) any event, change, occurrence, development or state of
circumstances or facts which does or would reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect on OSI;

            (b) any issuance, sale or delivery, or commitment to issue, sell or
deliver (whether through the issuance or granting of options, warrants,
commitments, subscriptions, rights to purchase or otherwise) any stock of any
class or any other securities or equity equivalents (including, without
limitation, any stock options or stock appreciation rights), except for the
issuance or sale of shares of OSI Common Stock pursuant to outstanding options
granted prior to January 1, 1999 under the OSI Option Plans;

            (c) any declaration, setting aside or payment of any dividend or
other distribution with respect to any shares of capital stock of OSI, or any
repurchase redemption or other acquisition by OSI or any subsidiary of any OSI
Securities;


                                       12
<PAGE>   21
            (d) any amendment of any term of any outstanding security of OSI or
any subsidiary;

            (e) (i) any incurrence or assumption by OSI or any subsidiary of any
indebtedness for borrowed money other than in the ordinary course of business
consistent with past practice or (ii) any guarantee, endorsement or other
incurrence or assumption of liability (whether directly, contingently or
otherwise) by OSI or any subsidiary for the obligations of any other person
(other than any wholly owned subsidiary of OSI, or OSI, with respect to its
subsidiaries), other than in the ordinary course of business consistent with
past practice;

            (f) any creation or assumption by OSI or any subsidiary of any Lien
of any kind or nature whatsoever on any asset of OSI or any subsidiary other
than (i) in the ordinary course of business consistent with past practice and
(ii) Liens which have not and would not reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect on OSI;

            (g) any making of any loan, advance or capital contribution to or
investment in any person by OSI or any subsidiary other than (i) loans, advances
or capital contributions to or investments in wholly owned subsidiaries of OSI
or (ii) loans or advances to employees of OSI or any subsidiary made in the
ordinary course of business consistent with past practice;

            (h) (i) any contract or agreement entered into by OSI or any
subsidiary relating to any material acquisition or disposition of any assets or
business or (ii) any modification, amendment, assignment, termination or
relinquishment by OSI or any subsidiary of any contract, license or other right
(including any insurance policy naming it as a beneficiary or a loss payee) that
does or would reasonably be expected to have, individually or in the aggregate,
a Material Adverse Effect on OSI, other than, in the case of (i) and (ii),
transactions, commitments, contracts or agreements (A) in the ordinary course of
business consistent with past practice, or (B) which have not had and would not
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on OSI;

            (i) any material change in any method of accounting or accounting
principles or practice (for financial accounting or tax purposes) by OSI or any
subsidiary, except for any such change required by reason of a change in GAAP;

            (j) any (i) grant of any severance or termination pay to any
director, officer or employee of OSI or any of its subsidiaries, other than
grants of severance or termination pay to employees (but not officers or
directors) in the ordinary course of business consistent with past practice;
(ii) entering into of any employment, deferred compensation or other similar
agreement (or any amendment to any such existing agreement) with any director,
officer or employee of OSI or any of its subsidiaries; (iii) increase in
benefits payable under any existing severance or termination pay policies or
employment agreements; or (iv) increase in compensation, bonus or other benefits


                                       13
<PAGE>   22
payable to directors, officers or employees of OSI or any of its subsidiaries
other than, in the case of clause (iv) only, increases in compensation, bonus or
other benefits payable to employees of OSI or any of its subsidiaries in the
ordinary and usual course of business consistent with past practice or merit
increases in salaries of employees at regularly scheduled times in customary
amounts consistent with past practices;

            (k) any action or proceeding commenced, threatened or proposed, to
condemn or take by eminent domain or other governmental action any real or
personal property owned or used by OSI and its subsidiaries, other than such
actions or proceedings that have not had and would not reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on OSI; or

            (l) any permanent removal (or any written demand or request for
permanent removal) of any outdoor advertising display owned or used by OSI and
its subsidiaries, other than such removals that have not had and would not
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on OSI.

      3.9 Litigation. Except as disclosed by OSI in the Filed OSI SEC Reports or
as disclosed in Section 3.9 of the OSI Disclosure Schedule, (i) there is no
material suit, claim, action, proceeding or investigation pending or, to the
knowledge of OSI, threatened against OSI or any of its subsidiaries or any of
their respective properties or assets and (ii) none of OSI or its subsidiaries
is subject to any outstanding material judgment, order, writ, injunction or
decree.

      3.10 Compliance with Applicable Law. Except as disclosed by OSI in the
Filed OSI SEC Reports and for failures which do not or would not reasonably be
expected to have, individually or in the aggregate, a Material Adverse Effect on
OSI, (i) OSI and its subsidiaries hold all permits, licenses, variances,
exemptions, orders and approvals of all Governmental Entities necessary for the
lawful conduct of their respective businesses, including, without limitation,
for the installation, maintenance and operation of advertising displays (the
"OSI Permits"), (ii) OSI and its subsidiaries are in compliance with the terms
of the OSI Permits, (iii) the businesses of OSI and its subsidiaries are not
being conducted in violation of any Law, including, without limitation, all such
Laws, ordinances and regulations relating to zoning, land use and billboard
operations and content, and (iv) no investigation or review by any Governmental
Entity with respect to OSI or its subsidiaries is pending or, to the knowledge
of OSI, threatened, nor, to the knowledge of OSI, has any Governmental Entity
indicated in writing an intention to conduct the same. No representation or
warranty is made in this Section 3.10 with respect to Environmental Laws (as
defined in Section 3.13(a)).

      3.11 Employee Plans.

            (a) Section 3.11(a) of the OSI Disclosure Schedule lists all
"employee benefit plans," as defined in Section 3(3) of the Employee Retirement
Income Security Act of 1974, as amended ("ERISA"), and lists by country (whether
or not covered by


                                       14
<PAGE>   23
ERISA) all other employee benefit plans or other benefit arrangements, including
but not limited to all bonus and other incentive compensation, deferred
compensation, disability, retention, salary continuation, stock and
stock-related award, stock option, stock purchase, or workers' compensation
agreements, plans, policies and arrangements which OSI or any of its
subsidiaries maintains, is a party to, contributed to or has any obligation to
or liability for in respect of current or former employees and directors,
whether domestic or international (each, a "OSI Employee Benefit Plan" and
collectively, the "OSI Employee Benefit Plans"). None of OSI Employee Benefit
Plans other than a "multiemployer plan" (within the meaning of Section 3(37) of
ERISA) is subject to Title IV of ERISA. OSI has no severance plans.

            (b) True, correct and complete copies of the following documents,
which are correct and complete in all material respects, with respect to each of
the OSI Employee Benefit Plans (other than a multiemployer plan), have been made
available to Infinity for review prior to the date hereof, to the extent
applicable: (i) any plans, all material amendments thereto and related trust
documents, and amendments thereto, (ii) the most recent Forms 5500 and all
schedules thereto and the most recent actuarial report, if any, (iii) the most
recent IRS determination letter, (iv) summary plan descriptions, (v) material
written communications to employees relating to the OSI Employee Benefit Plans,
(vi) written descriptions of all material non-written agreements relating to the
OSI Employee Benefit Plans and (vii) sample loan documents for the 401(k) plan.

            (c) Except as would not, individually or in the aggregate, have a
Material Adverse Effect on OSI, (i) all payments required to be made by or under
any OSI Employee Benefit Plan, any related trusts, insurance policies or
ancillary agreements, or any collective bargaining agreement have been timely
made, (ii) OSI and its subsidiaries have performed all obligations required to
be performed by them under any OSI Employee Benefit Plan, (iii) the OSI Employee
Benefit Plans have been administered and are in compliance in all respects with
their terms and the requirements of ERISA, the Code and other applicable Laws,
(iv) there are no actions, suits, arbitrations or claims (other than routine
claims for benefits) pending or, to the knowledge of OSI, threatened with
respect to any OSI Employee Benefit Plan and (v) there are no audits,
investigations or other inquiries pending or threatened by the IRS or the
Department of Labor with respect to any OSI Employee Benefit Plan.

            (d) Except as set forth in Section 3.11(d) of the OSI Disclosure
Schedule, each OSI Employee Benefit Plan and its related trust which are
intended to be "qualified" within the meaning of Sections 401(a) and 501(a) of
the Code, respectively, have been determined by the Internal Revenue Service to
be so "qualified" under such Sections, as amended by the Tax Reform Act of 1986,
and OSI knows of no fact which would adversely affect the qualified status of
any such OSI Employee Benefit Plan and its related trust.

            (e) Except as set forth in Section 3.11(e) of the OSI Disclosure
Schedule, neither the execution and delivery of this Agreement nor the
consummation of the


                                       15
<PAGE>   24
transactions contemplated hereby will solely, or in connection with any other
event, (i) increase any benefits otherwise payable under any OSI Employee
Benefit Plan, or (ii) result in the acceleration of the time of payment or
vesting of any such benefits. Neither the execution and delivery of this
Agreement nor the consummation of the transactions contemplated hereby will
result in any payment becoming due, or increase the compensation due, to any
current or former employee or director of OSI or any of its subsidiaries.

            (f) Except as set forth in Section 3.11(f) of the OSI Disclosure
Schedule, none of the OSI Employee Benefit Plans provides for post-employment
life or health insurance, benefits or coverage for any participant or any
beneficiary of a participant, except as may be required under the Consolidated
Omnibus Budget Reconciliation Act of 1985, as amended, or as may be offered as
individual conversion rights.

            (g) There is no litigation or administrative or other proceeding
involving any OSI Employee Benefit Plan nor has OSI or any of its subsidiaries
received notice that any such proceeding is threatened, in each case that would
have or reasonably be expected to have, individually or in the aggregate, a
Material Adverse Effect on OSI. Neither OSI nor any of its subsidiaries has
incurred, nor, to OSI's knowledge, assuming a withdrawal as of the Effective
Time, would be likely to incur any withdrawal liability with respect to any
"multiemployer plan" (within the meaning of section 3(37) of ERISA) which
remains unsatisfied in an amount which would have a Material Adverse Effect on
OSI. The termination of, or withdrawal from, any multiemployer plan to which OSI
or any of its subsidiaries contributes, on or prior to the Effective Time, will
not subject OSI or any of its subsidiaries to any liability under Title IV of
ERISA that would have a Material Adverse Effect on OSI.

      3.12 Labor and Employment Matters.

            (a) Section 3.12(a) of the OSI Disclosure Schedule sets forth a list
of all labor or collective bargaining agreements to which OSI or any subsidiary
of OSI is party and all employment or severance compensation agreements with
respect to employees receiving annual compensation in excess of $100,000. Except
as set forth in Section 3.12(a) of the OSI Disclosure Schedule, (i) there are no
labor or collective bargaining agreements which pertain to employees of OSI or
its subsidiaries, there are no employment or severance agreements with respect
to employees of OSI or its subsidiaries receiving annual compensation in excess
of $100,000 and (ii) neither OSI nor any of its subsidiaries is a party to or
bound by any agreement with any employee or consultant pursuant to which such
person would be entitled to receive any additional compensation or an
accelerated payment of compensation as a result of the (x) consummation of the
transactions contemplated hereby or (y) the termination of such employment or
consulting following such consummation. OSI has heretofore made available to
Infinity true and complete copies of the agreements listed on Section 3.12(a) of
the OSI Disclosure Schedule, together with all amendments, modifications,
supplements and side letters affecting the duties, rights and obligations of any
party thereunder.


                                       16
<PAGE>   25
            (b) Except as set forth in Section 3.12(b) of the OSI Disclosure
Schedule, no employees of OSI or any of its subsidiaries are represented by any
labor organization. No labor organization or group of employees of OSI or any of
its subsidiaries has made a pending demand for recognition or certification;
and, to OSI's knowledge, there are no representation or certification
proceedings or petitions seeking a representation proceeding presently pending
or threatened in writing to be brought or filed with the National Labor
Relations Board or any other labor relations tribunal or authority. To OSI's
knowledge, there are no organizing activities involving OSI or its subsidiaries
pending with any labor organization or group of employees of OSI or any of its
subsidiaries.

            (c) Except as has not had and would not reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on OSI,

                  (i) there are no unfair labor practice charges, grievances or
      complaints pending or threatened in writing by or on behalf of any
      employee or group of employees of OSI or its subsidiaries;

                  (ii) there are no complaints, charges or claims against OSI or
      its subsidiaries pending, or threatened in writing to be brought or filed,
      with any Governmental Entity or arbitrator based on, arising out of, in
      connection with, or otherwise relating to the employment or termination of
      employment of any individual by OSI or its subsidiaries; and

                  (iii) OSI and each of its subsidiaries is in compliance with
      all Laws relating to the employment of labor, including all such Laws and
      orders relating to wages, hours, collective bargaining, discrimination,
      civil rights, safety and health workers' compensation and the collection
      and payment of withholding and/or Social Security Taxes and similar Taxes.
      OSI and each of its subsidiaries has complied with the Workers Adjustment
      and Retraining Notification Act (or any similar state or local law) and
      has not incurred any liabilities or obligations in connection therewith
      which remain outstanding.

      3.13 Environmental Matters.

            (a) As used in this Agreement:

                  (i) "Environmental Costs and Liabilities" means any and all
      losses, liabilities, obligations, damages (including compensatory,
      punitive and consequential damages), fines, penalties, judgments, actions,
      claims, costs and expenses (including, without limitation, fees,
      disbursements and expenses of legal counsel, experts, engineers and
      consultants and the costs of investigation and feasibility studies and
      clean up, remove, treat, or in any other way address any Hazardous
      Materials (as hereinafter defined)) arising from, under or pursuant to any
      Environmental Law (as hereinafter defined);


                                       17
<PAGE>   26
                  (ii) "Environmental Law" means any applicable federal, state,
      local or foreign Law (including common Law), statute, rule, regulation,
      ordinance, decree or other legal requirement relating to the protection of
      natural resources, the environment and public and employee health and
      safety or pollution or the release or exposure to Hazardous Materials (as
      hereinafter defined) and shall include, without limitation, the
      Comprehensive Environmental Response, Compensation, and Liability Act
      ("CERCLA") (42 U.S.C. Section 9601 et seq.), the Hazardous Materials
      Transportation Act (49 U.S.C. Section 1801 et seq.), the Resource
      Conservation and Recovery Act (42 U.S.C. Section 6901 et seq.), the Clean
      Water Act (33 U.S.C. Section 1251 et seq.), the Clean Air Act (33 U.S.C.
      Section 7401 et seq.), the Toxic Substances Control Act (15 U.S.C. Section
      7401 et seq.), the Federal Insecticide, Fungicide, and Rodenticide Act (7
      U.S.C. Section 136 et seq.), and the Occupational Safety and Health Act
      (29 U.S.C. Section 651 et seq.) ("OSHA") and the regulations promulgated
      pursuant thereto, and any such applicable state or local statutes, and the
      regulations promulgated pursuant thereto, as such Laws have been and may
      be amended or supplemented through the Closing Date;

                  (iii) "Hazardous Material" means any substance, material or
      waste which is regulated, classified or otherwise characterized as
      hazardous, toxic, pollutant, contaminant or words of similar meaning or
      regulatory effect by any Governmental Entity or the United States, and
      includes, without limitation, petroleum, petroleum by-products and wastes,
      asbestos and polychlorinated biphenyls;

                  (iv) "Release" means any release, spill, effluent, emission,
      leaking pumping, injection, deposit, disposal, discharge, dispersal,
      leaching, or migration into the indoor or outdoor environment, or into or
      out of any property owned, operated or leased by the applicable party or
      its subsidiaries; and

                  (v) "Remedial Action" means all actions, including, without
      limitation, any capital expenditures, required by a Governmental Entity or
      required under or taken pursuant to any Environmental Law, or voluntarily
      undertaken to (A) clean up, remove, treat, or in any other way, ameliorate
      or address any Hazardous Materials or other substance in the indoor or
      outdoor environment; (B) prevent the Release or threat of Release, or
      minimize the further Release of any Hazardous Material so it does not
      endanger or threaten to endanger the public health or welfare of the
      indoor or outdoor environment; (C) perform pre-remedial studies and
      investigations or post-remedial monitoring and care pertaining or relating
      to a Release; or (D) bring the applicable party into compliance with any
      Environmental Law.


                                       18
<PAGE>   27
            (b) Except as has not had and would not reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on OSI, or as
set forth in Section 3.13 of the OSI Disclosure Schedule:

                  (i) The operations of OSI and its subsidiaries have been and,
      as of the Closing Date, will be, in compliance with all Environmental
      Laws, except for noncompliance that does not and would not reasonably be
      expected to result in OSI and its subsidiaries incurring Environmental
      Costs and Liabilities, and OSI is not aware of any facts, circumstances or
      conditions, which without significant capital expenditures, would prevent
      compliance in the future;

                  (ii) OSI and its subsidiaries have obtained and will, as of
      the Closing Date, maintain all permits, authorizations, licenses or
      similar approvals required under applicable Environmental Laws for the
      continued operations of their respective businesses;

                  (iii) OSI and its subsidiaries are not subject to any
      outstanding written orders or contracts with any Governmental Entity or
      other person respecting (A) Environmental Laws, (B) Remedial Action or (C)
      any Release or threatened Release of a Hazardous Material;

                  (iv) OSI and its subsidiaries have not received any written
      communication alleging, with respect to any such party, the violation of
      or liabilities (real or potential), under any Environmental Law;

                  (v) Neither OSI nor any of its subsidiaries has any contingent
      liability in connection with the Release of any Hazardous Material
      (whether on-site or off-site);

                  (vi) Except in compliance with Environmental Law, the
      operations of OSI or its subsidiaries do not involve the generation,
      transportation, treatment, storage or disposal of hazardous waste, as
      defined and regulated under 40 C.F.R. Parts 260-270 (in effect as of the
      date of this Agreement) or any state equivalent;

                  (vii) Except in compliance with Environmental Law, there is
      not now, nor to OSI's knowledge, has there been in the past, on or in any
      property of the Company or its subsidiaries any of the following: (A) any
      underground storage tanks (except those which have completed or are
      presently undergoing remediation) or surface impoundments, (B) any
      asbestos-containing materials, or (C) any polychlorinated biphenyls; and

                  (viii) No judicial or administrative proceedings are pending
      or, to OSI's knowledge, threatened against OSI and its subsidiaries
      alleging the violation of or seeking to impose liability pursuant to any
      Environmental Law and


                                       19
<PAGE>   28
      there are no investigations pending or, to OSI's knowledge, threatened
      against OSI or any of its subsidiaries under Environmental Laws.

            (c) None of the exceptions set forth in Section 3.13 of the OSI
Disclosure Schedule are reasonably likely to result in OSI and its subsidiaries
incurring Environmental Costs and Liabilities which would reasonably be expected
to have, individually or in the aggregate, a Material Adverse Effect on OSI.

            (d) OSI has made available to Infinity copies of all environmentally
related assessments, audits, investigations, sampling or similar reports
relating to OSI or its subsidiaries or any real property currently or formerly
owned, operated or leased by or for OSI and its subsidiaries.

      3.14 Taxes. Except as disclosed in Section 3.14 of the OSI Disclosure
Schedule:

            (a) Each of OSI and its subsidiaries has timely filed, or has caused
to be timely filed on its behalf (taking into account any extension of time
within which to file), all Tax Returns (as hereinafter defined) required to be
filed by it, and all such filed Tax Returns are true, complete and accurate,
except for any failure to file any Tax Return or for any inaccuracy with respect
to any Tax Return that has been filed which would not have, individually or in
the aggregate, a Material Adverse Effect on OSI. All Taxes shown to be due on
such Tax Returns have been timely paid.

            (b) The most recent financial statements contained in the OSI SEC
Reports reflect an adequate reserve for all Taxes payable by OSI and its
subsidiaries for all Taxable periods and portions thereof through the date of
such financial statements. To the best knowledge of OSI, no deficiency in excess
of $100,000 with respect to Taxes has been proposed, asserted or assessed
against OSI or any subsidiary of OSI. No material liens for Taxes exist with
respect to any asset of OSI or any subsidiary of OSI, except for statutory liens
for Taxes not yet due.

            (c) The Federal income Tax Returns of OSI and each subsidiary of OSI
have been examined by and settled with the United States Internal Revenue
Service (or the applicable statute of limitations has expired) for all years
through 1994, and the material state income and franchise Tax Returns and the
foreign Tax Returns of OSI and each subsidiary have been examined by and settled
with the applicable Tax authorities for the years specified in Section 3.14(c)
of the OSI Disclosure Schedule. All assessments for Taxes due with respect to
such completed and settled examinations or any concluded litigation have been
fully paid.

            (d) Neither OSI nor any subsidiary of OSI has any obligation under
any agreement (either with any person or any Tax authority) with respect to
Taxes, except for any agreements which would not have, individually or in the
aggregate, a Material Adverse Effect on OSI.


                                       20
<PAGE>   29
            (e) Neither OSI nor any subsidiary of OSI has constituted either a
"distributing corporation" or a "controlled corporation" (within the meaning of
Section 355(a)(1)(A) of the Code) in a distribution of stock qualifying for
Tax-free treatment under Section 355 of the Code.

            (f) No audit or other administrative or court proceedings in which
the total proposed adjustments to net income exceed $300,000 are pending with
respect to Federal, state or foreign income or franchise Taxes of OSI or any
subsidiary of OSI and no written notice thereof has been received.

            (g) No claim in writing has been made by a Tax authority in a
jurisdiction where neither OSI nor any subsidiary of OSI files Tax Returns that
OSI or any subsidiary is or may be subject to taxation in that jurisdiction.

            (h) Neither OSI nor any subsidiary of OSI is a party to any
contract, agreement or other arrangement which provides for the payment of any
amount which would not be deductible by reason of Section 162(m) or Section 280G
of the Code.

            (i) OSI has made available to Infinity true and complete copies of
(i) all Federal, state and foreign income and franchise Tax Returns of OSI and
its subsidiaries for the preceding three Taxable years and (ii) any audit report
issued within the last three years (or otherwise with respect to any audit or
proceeding in progress) relating to Taxes of OSI or any subsidiary.

            (j) No subsidiary of OSI owns any Shares.

            (k) None of OSI or any of its subsidiaries has taken, agreed to take
or will take any action that would prevent the Merger from constituting a
reorganization qualifying under the provisions of Section 368(a) of the Code.

            (l) For purposes of this Agreement:

            "Taxes" includes all taxes, whenever created or imposed, and whether
of the United States or elsewhere, and whether imposed by a local, municipal,
governmental, state, foreign, Federal or other Governmental Entity, or in
connection with any agreement with respect to Taxes including all interest,
penalties and additions imposed with respect to such amounts.

            "Tax Returns" means all Federal, state, local, provincial and
foreign Tax returns, declarations, statements, reports, schedules, forms and
information returns and any amended Tax return relating to Taxes.

      3.15 Material Contracts.

            (a) Section 3.15(a) of the OSI Disclosure Schedule (together with
Section 3.12 of the OSI Disclosure Schedule) lists all contracts and agreements
(and all material amendments, modifications and supplements thereto and all side
letters to which OSI or


                                       21
<PAGE>   30
any of its subsidiaries is a party materially affecting the obligations of any
party thereunder) to which OSI or any of its subsidiaries or any of its
subsidiaries is a party or by which any of its properties or assets are bound of
the following types: (i) contracts and agreements for the sale of advertising or
advertising services, or with advertising agencies or representatives, that
contain exclusivity or "most favored nation" provisions or account, individually
or in the aggregate for a series of related contracts, for net revenues per
annum of OSI and its subsidiaries in excess of $2 million; (ii) contracts and
agreements providing for a right of first refusal, first negotiation, "tag
along" or "drag along" rights applicable to any capital stock of OSI or assets
of OSI with an aggregate fair market value in excess of $500,000; (iii)
partnership, joint venture or cooperative development agreements, involving an
investment in excess of $500,000 or additional mandatory capital contributions
in excess of $500,000; (iv) contracts and agreements providing for the
acquisition, sale, or other disposition of material properties or assets of OSI
or its subsidiaries or predecessors (by merger, purchase or sale of assets or
stock or otherwise) entered into since January 1, 1995 and involving a purchase
price in excess of $5 million; (v) contracts and agreements with any transit,
transportation or similar authority or agreements with any Governmental Entity
that account, individually or in the aggregate for a series of related
contracts, for gross revenues per annum of OSI and its subsidiaries in excess of
$5 million; (vi) promotion, marketing, sponsorship or similar arrangements
involving annual payments in excess of $250,000; (vii) loan or credit
agreements, mortgages, indentures, or other agreements or instruments evidencing
indebtedness for borrowed money by OSI or any of its subsidiaries or any such
agreement or instrument pursuant to which indebtedness for borrowed money may be
incurred, including guaranties; (viii) contracts and agreements providing for
the provision of any services, products or payments to or from any officer,
director, or other affiliate of OSI or such officer, director or affiliate, and
such contracts and agreements involving employees or their affiliates if
payments in excess of $100,000 per annum are made to such employee or his
affiliate under such contract; (ix) agreements that purport to limit, curtail or
restrict the ability of OSI or any of its subsidiaries, or would restrict the
ability of Infinity or any of its subsidiaries, to compete in any geographic
area or line of business; and (x) all commitments and agreements to enter into
any contracts or agreements relating to any of the foregoing (collectively,
together with any such contracts entered into in accordance with Section 5.1
hereof, the "Material Contracts"). OSI has heretofore delivered or made
available to Infinity true, correct and complete copies of all Material
Contracts, except with respect to contracts listed in Section 3.15(a)(i); where
standard forms of OSI or advertising agency contracts are used.

            (b) Except as set forth in Section 3.15(b) of the OSI Disclosure
Schedule and except as have not had would not reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect on OSI, (A) each of
the Material Contracts, and (B) each lease of real property for outdoor
structures, licenses, easements and other agreements for the placement, use, or
construction of advertising displays including, without limitation, rights to
locations on which structures have not yet been built (the matters described in
this clause (B) being referred to herein as "Real Property Rights"), is valid
and enforceable in accordance with its terms, and (i) there is no default under
any


                                       22
<PAGE>   31
contract or agreement to which OSI or any of its subsidiaries is a party or by
which any of its properties or assets are bound, either by OSI or any of its
subsidiaries or, to the knowledge of OSI, by any other party thereto, (ii) no
event has occurred that with the lapse of time or the giving of notice or both
would constitute a default thereunder by OSI or any of its subsidiaries
(including the consummation of the Merger) or, to the knowledge of OSI, any
other party, and (iii) no party to any such contract or agreement has given
notice to OSI or any of its subsidiaries or made a claim against OSI or any of
its subsidiaries with respect to any breach or default thereunder.

      3.16 Insurance. OSI and its subsidiaries maintain adequate insurance with
respect to its properties and business against loss or damage of the kinds
customarily insured against by corporations of established reputations engaged
in the same or similar business and similarly situated, of such types and in
such amounts as are customarily carried under similar circumstances by such
other corporations.

      3.17 Real Property.

            (a) Section 3.17(a) of the OSI Disclosure Schedule sets forth all of
the real property owned in fee by OSI and its subsidiaries that is used for
operating facilities or office space or, to the knowledge of OSI, is material to
the conduct of the business of OSI and its subsidiaries, taken as a whole. Each
of OSI and its subsidiaries has good and marketable title to each parcel of
material real property owned by it and owns such real property free and clear of
all Liens, except (i) Liens for Taxes and general and special assessments not in
default and payable without penalty and interest, (ii) Liens created under the
CIBC Credit Documents and (iii) other Liens which do not and would not
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on OSI (collectively, "Permitted Liens").

            (b) Section 3.17(b) of the OSI Disclosure Schedule sets forth all
leases, subleases and other agreements under which OSI or any of its
subsidiaries uses or occupies or has the right to use or occupy, now or in the
future, any real property used for operating facilities or office space or, to
the knowledge of OSI, that is material to the conduct of the business of OSI and
its subsidiaries, taken as a whole, except leases of real property used for
advertising displays, which is covered by Section 3.15 (the "Real Property
Leases"). Each of OSI and its subsidiaries has a good and valid leasehold
interest in each parcel of real property leased by it free and clear of all
Liens, except Permitted Liens.

            (c) Except as have not and would not reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect, each of the Real
Property Leases is valid and enforceable in accordance with its terms, and (i)
there is no default under any Real Property Leases either by OSI or any of its
subsidiaries or, to the knowledge of OSI, by any other party thereto, (ii) no
event has occurred that with the lapse of time or the giving of notice or both
would constitute a default thereunder by OSI or any of its subsidiaries
(including the consummation of the Merger) or, to the knowledge of OSI, any
other party, and (iii) no party to any such contract or agreement


                                       23
<PAGE>   32
has given notice to OSI or any of its subsidiaries of or made any claim against
OSI or any of its subsidiaries with respect to any breach or default thereunder.

      3.18 Tangible Property. With respect to the tangible properties and assets
of OSI and its subsidiaries (excluding real property) that are material to the
conduct of the business of OSI and its subsidiaries, OSI and its subsidiaries
have good title to, or hold pursuant to valid and enforceable leases or
licenses, all such properties and assets. With such exceptions as have not had
and would not reasonably be expected to have, individually or in the aggregate,
a Material Adverse Effect on OSI, (i) all of the assets of OSI and its
subsidiaries, including without limitation all advertising displays, have been
maintained and repaired for their continued operation and are in good repair and
condition and (ii) all advertising displays of OSI and its subsidiaries are
located entirely on real property leased or owned by, or subject to a valid
easement held by, OSI or its subsidiaries.

      3.19 Intellectual Property. Subject to such exceptions which, individually
or in the aggregate, have not had and would not reasonably be expected to have a
Material Adverse Effect on OSI, OSI and its subsidiaries own or possess adequate
licenses or other valid rights to use all patents, patent rights, trademarks,
trademark rights, trade names, trade name rights copyrights service marks, trade
secrets, applications for trademarks and for service marks, know-how and other
proprietary rights and information used or held for use in connection with the
business of OSI and its subsidiaries as currently conducted or as contemplated
to be conducted and OSI is not aware of any assertion or claim challenging the
validity or enforceability of any of the foregoing which, individually or in the
aggregate, has had or would reasonably be expected to have a Material Adverse
Effect on OSI. Subject to such exceptions as have not and would not reasonably
be expected to have, individually or in the aggregate, a Material Adverse
Effect, there have been no claims made or notices that the conduct of OSI's
business has infringed the intellectual property rights of any third party.

      3.20 Year 2000. The latest Filed OSI SEC Report accurately describes OSI's
year 2000 compliance program and the state of year 2000 readiness of OSI's
Computer Programs (as hereinafter defined). To OSI's knowledge, there are no
facts or circumstances that would reasonably be expected to render OSI unable to
complete its Year 2000 compliance program as outlined in the latest Filed OSI
SEC Report. OSI has not received written notice from any customer, supplier or
financial institution that such party expects its operations to be disrupted as
a result of Computer Programs failures due to Year 2000 problems, which
disruption, individually or in the aggregate, would reasonably be expected to
have a Material Adverse Effect on OSI.

            For the purposes of this Agreement, "Computer Programs" means (i)
any and all computer software programs, including all source and object code;
(ii) databases and compilations, including any and all data and collections of
data, whether machine readable or otherwise; (iii) billing, reporting, and other
management information systems; (iv) all descriptions, flow-charts and other
work product used to design, plan, organize and develop any of the foregoing;
(v) all content contained on any Internet site(s); and


                                       24
<PAGE>   33
(vi) all documentation, including user manuals and training materials, relating
to any of the foregoing.

      3.21 Absence of Questionable Payments. Neither OSI nor any of its
subsidiaries nor, to OSI's knowledge, any director, officer, agent, employee or
other person acting on behalf of OSI or any of its subsidiaries, has used any
corporate or other funds for unlawful contributions, payments, gifts, or
entertainment, or made any unlawful expenditures relating to political activity
to government officials or others or established or maintained any unlawful or
unrecorded funds in violation of Section 30A of the Exchange Act. Neither OSI
nor any of its subsidiaries nor, to OSI's knowledge, any director, officer,
agent, employee or other person acting on behalf of OSI or any of its
subsidiaries, has accepted or received any unlawful contributions, payments,
gifts, or expenditures. To OSI's knowledge, OSI and each of its subsidiaries
which is required to file reports pursuant to Section 12 or 15(d) of the
Exchange Act is in compliance with the provisions of Section 13(b) of the
Exchange Act.

      3.22 Opinion of Financial Advisor. BT Alex Brown & Sons, Inc. (the "OSI
Financial Advisor") has delivered to the OSI Board its opinion, dated the date
of this Agreement, to the effect that, as of such date, the Merger Consideration
is fair to the holders of Shares from a financial point of view, and such
opinion has not been withdrawn or adversely modified.

      3.23 Brokers. No broker, finder or investment banker (other than the OSI
Financial Advisor, a true and correct copy of whose engagement agreement has
been provided to Infinity) is entitled to any brokerage, finder's or other fee
or commission or expense reimbursement in connection with the transactions
contemplated by this Agreement based upon arrangements made by and on behalf of
OSI or any of its affiliates.

      3.24 Takeover Statutes; Dissenters' Rights. OSI has taken all action
required to be taken by it in order to exempt this Agreement, the Stockholders
Agreement and the transactions contemplated hereby and thereby from, and this
Agreement, the Stockholders' Agreement and the transactions contemplate hereby
and thereby (the "Covered Transactions") are exempt from, (i) the requirements
of Section 203 of the DGCL, (ii) to the knowledge of OSI, any "moratorium",
"control share", "fair price", "affiliate transaction", "business combination",
or other anti-takeover Laws of any state (collectively, "Takeover Statutes") or
(iii) any anti-takeover provision in OSI's certificate of incorporation. Holders
of Shares do not have dissenters' rights in connection with the Merger.


                                       25
<PAGE>   34
                                    ARTICLE 4

                         REPRESENTATIONS AND WARRANTIES
                        OF INFINITY AND BURMA ACQUISITION

            Infinity and Burma Acquisition hereby represent and warrant to the
Company as follows:

      4.1 Organization and Qualification.

            (a) Each of Infinity and its subsidiaries is a corporation duly
organized, validly existing and in good standing under the Laws of the
jurisdiction of its incorporation or organization and has all requisite
corporate power and authority to own, lease and operate its properties and to
carry on its businesses as now being conducted. Each of Infinity and its
subsidiaries is duly qualified and in good standing to do business in each
jurisdiction in which the property owned, leased or operated by it or the nature
of the business conducted by it makes such qualification necessary, except in
such jurisdictions where the failure to be so duly qualified and in good
standing has not had and would not, individually or in the aggregate, reasonably
be expected to have a Material Adverse Effect on Infinity.

            (b) Except as set forth in Section 4.1(b) of the Infinity Disclosure
Schedule, Infinity has no subsidiaries and does not own, directly or indirectly,
beneficially or of record, any shares of capital stock or other security of any
other material investment in any other entity.

      4.2 Capitalization of Infinity and Its Subsidiaries.

            (a) The authorized capital stock of Infinity consists of (i)
2,000,000,000 shares of Infinity Common Stock, (ii) 2,000,000,000 shares of
Class B Common Stock, par value $.01 per share (the "Class B Common Stock", and
(iii) 50,000,000 shares of Preferred Stock, par value $.01 per share (the
"Infinity Preferred Stock"). As of May 25, 1999, 155,250,000 shares of Infinity
Common Stock, 700,000,000 shares of Class B Common Stock and no shares of
Infinity Preferred Stock were issued and outstanding. As of May 25, 1999,
options to acquire 5,424,028 shares of Infinity Common Stock were outstanding.
As of March 31, 1999, 22,500,000 shares of Infinity Common Stock were reserved
for issuance under Infinity's employee and director stock plans and 700,000,000
shares of Infinity Common Stock were reserved for issuance upon conversion of
shares of Class B Common Stock. All the outstanding shares of Infinity Common
Stock are, and all shares to be issued as part of the Merger Consideration will
be, when issued in accordance with the terms hereof, duly authorized, validly
issued, fully paid and non-assessable. Except as set forth above in this Section
4.2(a), as of the date hereof, there are outstanding (i) no shares of capital
stock or other voting securities of Infinity, (ii) no securities of Infinity or
its subsidiaries convertible into or exchangeable for shares of capital stock or
voting securities of Infinity, (iii) no options or other rights to acquire from
Infinity or its subsidiaries, and no obligations of Infinity or its subsidiaries
to issue,


                                       26
<PAGE>   35
any capital stock, voting securities or securities convertible into or
exchangeable for capital stock or voting securities of Infinity, and (iv) no
equity equivalents, or interests in the ownership or earnings, of Infinity or
other similar rights (including stock appreciation rights) (collectively,
"Infinity Securities"). Except as set forth in Article Twelfth of Infinity's
Certificate of Incorporation, there are no outstanding obligations of Infinity
or its subsidiaries to repurchase, redeem or otherwise acquire any Infinity
Securities. Except as set forth in Section 4.2(a) of the Infinity Disclosure
Schedule, there are no shareholder agreements, voting trusts or other agreements
or understandings to which Infinity is a party or to which it is bound relating
to the voting of any shares of capital stock of Infinity.

            (b) Except as set forth in Section 4.2(b) of the Infinity Disclosure
Schedule, all of the outstanding capital stock of Infinity's subsidiaries is
owned by Infinity, directly or indirectly, free and clear of any Lien or any
other limitation or restriction (including any restriction on the right to vote
or sell the same, except as may be provided as a matter of Law). Except as set
forth in Section 4.2(b) of the Infinity Disclosure Schedule, there are no
securities of Infinity or its subsidiaries convertible into or exchangeable for,
no options or other rights to acquire from Infinity or its subsidiaries, and no
other contract, understanding, arrangement or obligation (whether or not
contingent) providing for the issuance or sale, directly or indirectly, of any
capital stock or other ownership interests in, or any other securities of, any
subsidiary of Infinity. Except as set forth in Section 4.2(b) of the Infinity
Disclosure Schedule, there are no outstanding contractual obligations of
Infinity or its subsidiaries to repurchase, redeem or otherwise acquire any
outstanding shares of capital stock or other ownership interests in any
subsidiary of Infinity, except for redemption provisions contained in the
certificate of incorporation of certain subsidiaries similar to Article Twelfth
of Infinity's Certificate of Incorporation.

      4.3 Authority Relative to This Agreement. Infinity and Burma Acquisition
have all necessary corporate power and authority to execute and deliver this
Agreement and to consummate the transactions contemplated hereby. The execution
and delivery of this Agreement and the consummation of the transactions
contemplated hereby have been duly and validly authorized by the Boards of
Directors of Infinity and Burma Acquisition, and by Infinity as the sole
stockholder of Burma Acquisition, and no other corporate proceedings on the part
of Infinity or Burma Acquisition are necessary to authorize this Agreement or to
consummate the transactions contemplated hereby (other than, with respect to the
issuance of the Infinity Common Stock in the Merger (the "Share Issuance"), the
approval of such issuance by the holders of a majority of the voting power of
the Infinity Common Stock and the Class B Common Stock, voting as one class (the
"Infinity Requisite Vote")). This Agreement has been duly and validly executed
and delivered by each of Infinity and Burma Acquisition and constitutes a valid,
legal and binding agreement each of Infinity and Burma Acquisition, enforceable
against Infinity and Burma Acquisition, respectively, in accordance with its
terms.


                                       27
<PAGE>   36
      4.4 SEC Reports; Financial Statements; No Undisclosed Liabilities.

            (a) Infinity has filed all required forms, reports and documents
with the SEC since January 1, 1999 and the final prospectus dated December 9,
1998 (the "Infinity SEC Reports"), each of which has complied in all material
respects with all applicable requirements of the Securities Act and the Exchange
Act, each as in effect on the dates such Infinity SEC Reports were filed. None
of the Infinity SEC Reports, including, without limitation, any financial
statements or schedules included or incorporated by reference therein,
contained, when filed, any untrue statement of a material fact or omitted to
state a material fact required to be stated or incorporated by reference therein
or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading. The consolidated
financial statements of Infinity included in the Infinity SEC Reports complied
as to form in all material respects with applicable accounting requirements and
the published rules and regulations of the SEC with respect thereto as in effect
on the dates such Infinity SEC Reports were filed, and fairly present, in all
material respects and in conformity with GAAP applied on a consistent basis
(except as may be indicated in the notes thereto), the consolidated financial
position of Infinity and its consolidated subsidiaries as of the dates thereof
and their consolidated results of operations and changes in financial position
for the periods then ended (subject, in the case of the unaudited interim
financial statements, to normal year-end adjustments which are not expected to
be material).

            (b) Except as and to the extent disclosed or reflected in the
Infinity SEC Reports filed prior to the date of this Agreement (the "Filed
Infinity SEC Reports"), neither Infinity nor any of its subsidiaries has any
liabilities or obligations of any nature, whether or not accrued, contingent or
otherwise, whether due or to become due or asserted or unasserted which would
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on Infinity.

      4.5 Information Supplied.

            (a) None of the information supplied or to be supplied by Infinity
for inclusion in the Proxy Statement will, at the date mailed to stockholders of
OSI and at the time of the meeting of stockholder of OSI to be held in
connection with the Merger, contain any untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they are made, not misleading. If, at any time prior to the Effective Time, any
event with respect to Infinity, its officers and directors or any of its
subsidiaries should occur which is required to be described in the Proxy
Statement (or an amendment or supplement thereto), Infinity shall promptly so
advise OSI.

            (b) Neither the S-4 nor any amendment thereto will at the time it
becomes effective under the Securities Act or at the Effective Time contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary in order to make the statements therein, in light
of the circumstances under which they are made, not misleading. The information
statement relating to the meeting of Infinity's


                                       28
<PAGE>   37
stockholders to be held in connection with the Share Issuance, including any
amendment thereof or supplement thereto (the "Information Statement"), will not,
at the date mailed to stockholders of Infinity and at the time of the meeting of
stockholders of Infinity to be held in connection with the Share Issuance,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary to make the statements therein,
in light of the circumstances under which they were made, not misleading. No
representation or warranty is made by Infinity in this Section 4.5 with respect
to statements made or incorporated by reference therein based on information
supplied by OSI or any of its subsidiaries for inclusion or incorporation by
reference in the S-4 or the Information Statement. The S-4 will comply as to
form in all material respects with the applicable provisions of the Securities
Act and the rules and regulations thereunder and the Information Statement will
comply as to form in all material respects with the applicable provisions, of
the Exchange Act and the rules and regulations thereunder.

      4.6 Consents and Approvals; No Violations. Except for filings, permits,
authorizations, consents and approvals as may be required under, and other
applicable requirements of, the Securities Act, the Exchange Act, state
securities or blue sky Laws, the New York Stock Exchange, Inc. (the "NYSE"), the
HSR Act, the Canada Act, the Comision Federal de Competencia of Mexico and the
filing and recordation of a certificate of merger as required by the DGCL (the
"Infinity Required Approvals"), no filing with or notice to, and no permit,
authorization, consent or approval of, any Governmental Entity is necessary for
the execution and delivery by Infinity and Burma Acquisition of this Agreement
or the consummation by Infinity and Burma Acquisition of the transactions
contemplated hereby, except where the failure to obtain such permits,
authorizations, consents or approvals or to make such filings or give such
notice would not reasonably be expected to have, individually or in the
aggregate, a Material Adverse Effect on Infinity. Subject to obtaining the of
the Infinity Required Approvals, neither the execution, delivery and performance
of this Agreement by Infinity and Burma Acquisition nor the consummation by
Infinity and Burma Acquisition of the transactions contemplated hereby will (i)
conflict with or result in any breach of any provision of the respective
certificate or articles of incorporation or bylaws (or similar governing
documents) of Infinity or any of Infinity's subsidiaries, (ii) result in a
violation or breach of, or constitute (with or without due notice or lapse of
time or both) a default (or give rise to any right of termination, amendment,
cancellation or acceleration or Lien) under, any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, lease, license, contract,
agreement or other instrument or obligation to which Infinity or any of
Infinity's subsidiaries is a party or by which any of them or any of their
respective properties or assets may be bound or (iii) violate any Law,
applicable to Infinity or any of Infinity's subsidiaries or any of their
respective properties or assets, except in the case of (ii) or (iii) for
violations, breaches or defaults which would not reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect on Infinity.

      4.7 No Default. None of Infinity or its subsidiaries is in default or
violation (and no event has occurred which with or without due notice or the
lapse of time or both


                                       29
<PAGE>   38
would constitute a default or violation) of any term, condition or provision of
(i) its certificate or articles of incorporation or bylaws (or similar governing
documents), (ii) any note, bond, mortgage, indenture, lease, license, contract,
agreement or other instrument or obligation to which Infinity or any of its
subsidiaries is now a party or by which any of them or any of their respective
properties or assets may be bound or (iii) any, Law, applicable to Infinity, its
subsidiaries or any of their respective properties or assets, except in the case
of (ii) or (iii) for violations, breaches or defaults which do not or would not
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on Infinity.

      4.8 Absence of Changes. Except as and to the extent disclosed by Infinity
in the Filed Infinity SEC Reports, from January 1, 1999 through the date of this
Agreement, Infinity and its subsidiaries have conducted their business in all
material respects in the ordinary and usual course consistent with past
practices and there has not been:

            (a) any event, change, occurrence, development or state of
circumstances or facts which does or would reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect on Infinity;

            (b) except as set forth in Section 4.8(b) of the Infinity Disclosure
Schedule, any issuance, sale or delivery, or commitment to issue, sell or
deliver (whether through the issuance or granting of options, warrants,
commitments, subscriptions, rights to purchase or otherwise) any stock of any
class or any other securities or equity equivalents (including, without
limitation, any stock options or stock appreciation rights), except for the
issuance or sale of shares of Infinity Common Stock pursuant to outstanding
options granted prior to January 1, 1999;

            (c) except as set forth in Section 4.8(c) of the Infinity Disclosure
Schedule, any amendment of any term of any outstanding security of Infinity or
any subsidiary;

            (d) any declaration, setting aside or payment of any dividend or
other distribution with respect to any shares of capital stock of Infinity, or
any repurchase, redemption or other acquisition by Infinity or any subsidiary of
any Infinity securities;

            (e) any material change in any method of accounting or accounting
principles or practice (for financial accounting or tax purposes) by Infinity or
any subsidiary, except for any such change required by reason of a change in
GAAP.

      4.9 Litigation. Except as disclosed by Infinity in the Filed Infinity SEC
Reports, and as set forth in Section 4.9 of the Infinity Disclosure Schedule,
(i) there is no suit, claim, action, proceeding or investigation pending or, to
the knowledge of Infinity, threatened against Infinity or any of its
subsidiaries or any of their respective properties or assets and (ii) none of
Infinity or its subsidiaries is subject to any outstanding judgment, order,
writ, injunction or decree which (in the case of (i) or (ii) would


                                       30
<PAGE>   39
reasonably be expected, individually or in the aggregate, to have a Material
Adverse Effect on Infinity.

      4.10 Compliance with Applicable Law. Except as disclosed by Infinity in
the Filed Infinity SEC Reports or as set forth in Section 4.10 of the Infinity
Disclosure Schedule and for failures which do not or would not reasonably be
expected to have, individually or in the aggregate, a Material Adverse Effect on
Infinity, (i) Infinity and its subsidiaries hold all permits, licenses,
variances, exemptions, orders and approvals of all Governmental Entities
necessary for the lawful conduct of their respective businesses (the "Infinity
Permits"), (ii) Infinity and its subsidiaries are in compliance with the terms
of Infinity Permits, (iii) the businesses of Infinity and its subsidiaries are
not being conducted in violation of any Law of any Governmental Entity and (iv)
no investigation or review by any Governmental Entity with respect to Infinity
or its subsidiaries is pending or, to the knowledge of Infinity, threatened,
nor, to the knowledge of Infinity, has any Governmental Entity indicated an
intention to conduct the same.

      4.11 Employee Plans.

            (a) Section 4.11(a) of the Infinity Disclosure Schedule lists all
"employee benefit plans," as defined in Section 3(3) of ERISA and lists by
country (whether or not covered by ERISA) all other employee benefit plans or
other benefit arrangements, including but not limited to all bonus and other
incentive compensation, deferred compensation, disability, retention, salary
continuation, severance, stock and stock-related award, stock option, stock
purchase, or other plans which Infinity or any of its subsidiaries maintains, is
a party to, contributed to or has any obligation to or liability for in respect
of current or former employees and directors whether domestic or international
(each, an "Infinity Employee Benefit Plan" and collectively, the "Infinity
Employee Benefit Plans"). None of the Infinity Employee Benefit Plans other than
a "multiemployer plan" (within the meaning of section 3(37) of ERISA) is subject
to Title IV of ERISA.

            (b) Except as would not, individually or in the aggregate, have a
Material Adverse Effect on Infinity, (i) all payments required to be made by or
under any Infinity Employee Benefit Plan, any related trusts, insurance policies
or ancillary agreements, or any collective bargaining agreement have been timely
made, (ii) Infinity and its subsidiaries have performed all obligations required
to be performed by them under any Infinity Employee Benefit Plan, (iii) the
Infinity Employee Benefit Plans have been administered and are in compliance in
all respects with their terms and the requirements of ERISA, the Code and other
applicable Laws, (iv) except as set forth in Section 4.11(b) of the Infinity
Disclosure Schedule, there are no actions, suits, arbitrations or claims (other
than routine claims for benefits) pending or, to the knowledge of Infinity,
threatened with respect to any Infinity Employee Benefit Plan and (v) there are
no audits, investigations or other inquiries pending or threatened by the IRS or
the Department of Labor with respect to any Infinity Employee Benefit Plan.


                                       31
<PAGE>   40
            (c) Each Infinity Employee Benefit Plan and its related trust which
are intended to be "qualified" within the meaning of Sections 401(a) and 501(a)
of the Code, respectively, have been determined by the Internal Revenue Service
to be so "qualified" under such Sections, as amended by the Tax Reform Act of
1986, and Infinity knows of no fact which would adversely affect the qualified
status of any such Infinity Employee Benefit Plan and its related trust.

            (d) Except as set forth in Section 4.11(d) of the Infinity
Disclosure Schedule, none of the Infinity Employee Benefit Plans provides for
post-employment life or health insurance, benefits or coverage for any
participant or any beneficiary of a participant, except as may be required under
the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended, or as
may be offered as individual conversion rights.

            (e) There is no litigation or administrative or other proceedings
involving an Infinity Employee Benefit Plan nor has Infinity or any of its
subsidiaries received notice that any such proceeding is threatened, in each
case that would have or reasonably be expected to have, individually or in the
aggregate, a Material Adverse Effect on Infinity. Neither Infinity nor any of
its subsidiaries has incurred, nor, to Infinity's knowledge, assuming a
withdrawal as of the Effective Time, would be likely to incur any withdrawal
liability with respect to any "multiemployer plan" (within the meaning of
section 3(37) of ERISA) which remains unsatisfied in an amount which would have
a Material Adverse Effect on Infinity. The termination of, or withdrawal from,
any multiemployer plan to which Infinity or any of its subsidiaries contributes,
on or prior to the Effective Time, will not subject Infinity or any of its
subsidiaries to any liability under Title IV of ERISA that would have a Material
Adverse Effect on Infinity.

      4.12 Taxes. Except as disclosed in Section 4.12 of the Infinity Disclosure
Schedule:

            (a) Each of Infinity and its subsidiaries has timely filed, or has
caused to be timely filed on its behalf (taking into account any extension of
time within which to file), all Tax Returns (as hereinafter defined) required to
be filed by it, and all such filed Tax Return are true, complete and accurate,
except for any failure to file any Tax Return or for any inaccuracy with respect
to any Tax Return that has been filed which would not have, individually or in
the aggregate, a Material Adverse Effect on Infinity . All Taxes shown to be due
on such Tax Returns have been timely paid.

            (b) The most recent financial statements contained in the Infinity
SEC Reports reflect an adequate reserve for all Taxes payable by Infinity and
its subsidiaries for all Taxable periods and portions thereof through the date
of such financial statements. To the best knowledge of Infinity, no deficiency
in excess of $100,000 with respect to Taxes has been proposed, asserted or
assessed against Infinity or any subsidiary of Infinity. No material liens for
Taxes exist with respect to any asset of Infinity or any subsidiary of Infinity,
except for statutory liens for Taxes not yet due.

            (c) The Federal and state income Tax Returns and state franchise tax
returns of Infinity and each subsidiary of Infinity have not been examined by
the applicable Tax authorities (or the applicable statute of limitations has
expired). All assessments for Taxes due with respect to such completed and
settled examinations or any concluded litigation have been fully paid.


                                       32
<PAGE>   41
            (d) Neither Infinity nor any subsidiary of Infinity has any
obligation under any agreement (either with any person or any Tax authority)
with respect to Taxes, except for any such agreements which would not have,
individually or in the aggregate, a Material Adverse Effect on Infinity.

            (e) No audit or other administrative or court proceedings in which
the total proposed adjustments to net income exceed $300,000 are pending with
respect to Federal or state income or franchise Taxes of Infinity or any
subsidiary of Infinity and no notice thereof has been received.

            (f) No claim has been made by a Tax authority in a jurisdiction
where neither Infinity nor any subsidiary of Infinity files Tax Returns that
Infinity or any subsidiary is or may be subject to taxation in that
jurisdiction.

            (g) None of Infinity or any of its subsidiaries has taken, agreed to
take or will take any action that would prevent the Merger from constituting a
reorganization qualifying under the provisions of Section 368(a) of the Code.

      4.13 No Prior Activities. Except for obligations incurred in connection
with its incorporation or organization or the negotiation and consummation of
this Agreement and the transactions contemplated hereby, Burma Acquisition has
neither incurred any obligation or liability nor engaged in any business or
activity of any time or kind whatsoever or entered into any agreement or
arrangement with any person.

      4.14 Absence of Questionable Payments. Neither Infinity nor any of its
subsidiaries nor, to Infinity's knowledge, any director, officer, agent,
employee or other person acting on behalf of Infinity or any of its
subsidiaries, has used any corporate or other funds for unlawful contributions,
payments, gifts, or entertainment, or made any unlawful expenditures relating to
political activity to government officials or others or established or
maintained any unlawful or unrecorded funds in violation of Section 30A of the
Exchange Act. Neither Infinity nor any of its subsidiaries nor, to Infinity's
knowledge, any director, officer, agent, employee or other person acting on
behalf of Infinity or any of its subsidiaries, has accepted or received any
unlawful contributions, payments, gifts, or expenditures. To Infinity's
knowledge, Infinity and each of its subsidiaries which is required to file
reports pursuant to Section 12 or 15(d) of the Exchange Act is in compliance
with the provisions of Section 13(b) of the Exchange Act.

      4.15 Brokers. No broker, finder or investment banker (other than Chase
Securities Inc.) is entitled to any brokerage, finder's or other fee or
commission in connection with the transactions contemplated by this Agreement
based upon arrangements made by and on behalf of Infinity or any of its
affiliates.

      4.16 Contracts. Except as set forth in Section 4.16 of the Infinity
Disclosure Schedule, each of the material contracts and agreements to which
Infinity or any of its subsidiaries is a party or by which any of its properties
or assets are bound, is valid and enforceable in accordance with its terms, and
(i) there is no default under any contract or


                                       33
<PAGE>   42
agreement to which Infinity or any of its subsidiaries is a party or by which
any of its properties or assets are bound, either by Infinity or any of its
subsidiaries or, to the knowledge of Infinity, by any other party thereto, (ii)
no event has occurred that with the lapse of time or the giving of notice or
both would constitute a default thereunder by Infinity or any of its
subsidiaries (including the consummation of the Merger) or, to the knowledge of
Infinity, any other party, and (iii) no party to any such contract or agreement
has given notice to Infinity or any of its subsidiaries or made a claim against
Infinity or any of its subsidiaries with respect to any breach or default
thereunder, in any such case in which such default or event has had, or would
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect on Infinity.

                                    ARTICLE 5

                                    COVENANTS

      5.1 Conduct of Business of OSI. Except as contemplated by this Agreement,
during the period from the date hereof to the Effective Time, OSI will, and will
cause each of its subsidiaries to, conduct its operations in the ordinary course
of business consistent with past practice and, to the extent consistent
therewith, with no less diligence and effort than would be applied in the
absence of this Agreement, seek to preserve intact its current business
organizations, seek to keep available the service of its current officers and
employees and seek to preserve its relationships with customers, suppliers and
others having business dealings with it to the end that goodwill and ongoing
businesses shall be unimpaired at the Effective Time. Without limiting the
generality of the foregoing, and except as otherwise expressly provided in this
Agreement, prior to the Effective Time, OSI shall not, and shall not permit any
of its subsidiaries to, without the prior written consent of Infinity:

            (a) amend its certificate or articles of incorporation or bylaws (or
other similar governing instrument);

            (b) authorize for issuance, issue, sell, deliver or agree or commit
to issue, sell or deliver (whether through the issuance or granting of options,
warrants, commitments, subscriptions, rights to purchase or otherwise) any stock
of any class or any other securities or equity equivalents (including, without
limitation, any stock options or stock appreciation rights), except for the
issuance or sale of shares of OSI Common Stock pursuant to outstanding options
or other equity rights granted prior to the date hereof under the OSI Option
Plans;

            (c) split, combine or reclassify any shares of its capital stock,
declare, set aside or pay any dividend or other distribution (whether in cash,
stock or property or any combination thereof) in respect of its capital stock
(except that any wholly owned subsidiary of OSI may pay a dividend or other
distribution to OSI or any wholly owned subsidiary of OSI), make any other
actual, constructive or deemed distribution in respect of any shares of its
capital stock or otherwise make any payments to shareholders in their


                                       34
<PAGE>   43
capacity as such, or redeem or otherwise acquire any of its securities or any
securities of any of its subsidiaries;

            (d) adopt a plan of complete or partial liquidation, dissolution,
merger, consolidation, restructuring, recapitalization or other reorganization
of OSI or any of its subsidiaries (except that OSI and/or any subsidiary of OSI
may adopt a plan of merger in connection with a merger of any subsidiary of OSI
into OSI or other subsidiary of OSI);

            (e) alter through merger, liquidation, reorganization, restructuring
or in any other fashion the corporate structure or ownership of OSI or any of
its subsidiaries, except for any such alteration with respect to any subsidiary
of OSI which would not decrease the ownership interest of OSI in such subsidiary
and which would not reasonably be expected to have a Material Adverse Effect on
OSI;

            (f) except as may be required by Law, (i) enter into, adopt or amend
(other than immaterial amendments in the ordinary course of business) or
terminate any bonus, profit sharing, compensation, severance, termination, stock
option, stock appreciation right, restricted stock, performance unit, stock
equivalent, stock purchase, pension, retirement, deferred compensation,
employment or other employee benefit agreement, trust, plan, fund, award or
other arrangement for the benefit or welfare of any director, officer or
employee in any manner, except for grants of severance or termination pay to
employees (but not officers or directors) in the ordinary course of business
consistent with past practice; or (ii) except for normal increases in the
ordinary course of business consistent with past practice that, in the
aggregate, do not result in a material increase in benefits or compensation
expense to OSI, increase in any manner the compensation or fringe benefits of
any director, officer or employee or pay any benefit not required by any plan
and arrangement as in effect as of the date hereof;

            (g) except in the ordinary course of business consistent with past
practice, hire or retain any individual as an employee of or consultant to OSI
or any subsidiary of OSI;

            (h) except in the ordinary course of business consistent with past
practice, enter into, renew or modify any agreement which, if in effect on the
date hereof, would have been required to be disclosed in Section 3.15 of the OSI
Disclosure Schedule or any Real Property Rights; provided, that notwithstanding
the foregoing, Infinity shall have the right to consent to any amendment to the
CIBC Credit Documents or the OSI Indentures;

            (i) except as may be required as a result of a change in Law or in
GAAP, change any of the accounting principles or practices (whether for
financial accounting or tax purposes) used by it;

            (j) revalue any of its assets, including, without limitation,
writing up or down the value of inventory or writing-off notes or accounts
receivable other than in the ordinary course of business consistent with past
practice;


                                       35
<PAGE>   44
            (k) make or revoke any Tax election or settle or compromise any Tax
liability material to OSI and its subsidiaries taken as a whole, or change (or
make a request to any Taxing authority to change) any material aspect of its
method of accounting for Tax purposes;

            (l) pay, discharge or satisfy any material claims, liabilities or
obligations (absolute, accrued, asserted or unasserted, contingent or
otherwise), other than the payment, discharge or satisfaction in the ordinary
course of business of liabilities reflected or reserved against in, or
contemplated by, the consolidated financial statements as of March 31, 1999 (or
the notes thereto) of OSI and its subsidiaries or incurred in the ordinary
course of business consistent with past practice;

            (m) settle or compromise any pending or threatened suit, action or
claim, which settlement involves equitable relief or a payment in excess of
$500,000 individually or $500,000 in the aggregate, which is not covered by
insurance or is covered by insurance which contains a retroactive premium
adjustment, or initiate or join any material suit, action or claim;

            (n) (i) incur or assume any long-term or short-term debt or issue
any debt securities except for borrowings under existing lines of credit in the
ordinary course of business; (ii) assume, guarantee, endorse or otherwise become
liable or responsible (whether directly, contingently or otherwise) for the
obligations of any other person except in the ordinary course of business
consistent with past practice and in amounts not material to OSI and its
subsidiaries, taken as a whole, and except for obligations of wholly owned
subsidiaries of OSI; (iii) except as set forth in Section 5.1(n) of the OSI
Disclosure Schedule, make any loans, advances or capital contributions to, or,
except for immaterial investments in the ordinary course of business consistent
with past practice, investments in, any other person (other than to wholly owned
subsidiaries of OSI or OSI, with respect to its subsidiaries, or customary loans
or advances to employees in the ordinary course of business consistent with past
practice and in amounts not material to the maker of such loan or advance); (iv)
pledge or otherwise encumber shares of capital stock of OSI or its subsidiaries;
or (v) mortgage or pledge any of its assets, tangible or intangible, or create
or, except pursuant to the CIBC Credit Documents and except for Permitted Liens,
suffer to exist any Lien thereupon;

            (o) (i) sell, lease or dispose of any assets outside the ordinary
course of business or any assets which in the aggregate are material to OSI and
its subsidiaries, taken as a whole; or (ii) enter into any commitment or
transaction outside the ordinary course of business;

            (p) (i) except as set forth in Section 5.1(p) of the OSI Disclosure
Schedule or otherwise disclosed by OSI in writing to Infinity on or prior to the
date hereof, acquire (by merger, consolidation, or acquisition of stock or
assets) any corporation, partnership or other business organization or division
thereof or any equity interest therein, or any assets, for consideration in
excess of $10 million individually or in the aggregate; (ii) authorize any
capital expenditure or expenditures which, in the aggregate, are in


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<PAGE>   45
excess of the amounts therefor set forth in the OSI 1999 capital expenditure
budget delivered to Infinity prior to the date hereof (which provides for
aggregate capital expenditures of up to $40 million for 1999); or (iii) enter
into any contract, agreement, commitment or arrangement providing for the taking
of any action that would be prohibited hereunder or amend any contract,
commitment or arrangement in a way that could reasonably be expected to hinder
the transactions contemplated by this Agreement;

            (q) take any action that would prevent or impede the Merger from
qualifying as a reorganization under Section 368(a) of the Code; or

            (r) take, propose to take, or agree in writing or otherwise to take,
any of the actions described in Sections 5.1(a) through 5.1(q) or any action
which would make any of the representations or warranties of OSI contained in
this Agreement untrue or incorrect.

      5.2 Conduct of Business of Infinity. Except as contemplated by this
Agreement, during the period from the date hereof to the Effective Time,
Infinity and its subsidiaries shall conduct their respective operations in the
ordinary course of business consistent with past practice and, to the extent
consistent therewith, with no less diligence and effort than would be applied in
the absence of this Agreement. Without limiting the generality of the foregoing,
and except as otherwise expressly provided in this Agreement, prior to the
Effective Time, Infinity shall not, and shall not permit its subsidiaries to,
without the prior written consent of OSI:

            (a) amend its certificate or articles of incorporation or bylaws (or
other similar governing instrument) in a manner which adversely affects the
rights, powers and preferences of the Infinity Common Stock;

            (b) adopt a plan of complete or partial liquidation, dissolution,
merger, consolidation, restructuring, recapitalization or other reorganization
of Infinity or any of its subsidiaries (except that Infinity and/or any
subsidiary of Infinity may adopt a plan of merger in connection with (i) a
merger of any subsidiary of Infinity into Infinity or another subsidiary of
Infinity or (ii) an acquisition or disposition of a business or assets, except
for any such acquisition or disposition which would have a Material Adverse
Effect on Infinity);

            (c) split, combine or reclassify any shares of its capital stock,
declare, set aside or pay any dividend or other distribution (whether in cash,
stock or property or any combination thereof) in respect of its capital stock
(except that any wholly owned subsidiary of Infinity may pay a dividend or other
distribution to Infinity or any wholly owned subsidiary of Infinity), make any
other actual, constructive or deemed distribution in respect of any shares of
its capital stock or otherwise make any payments to shareholders in their
capacity as such, or redeem or otherwise acquire any of its securities or any
securities of any of its subsidiaries;


                                       37
<PAGE>   46
            (d) alter through merger, liquidation, reorganization, restructuring
or in any other fashion the corporate structure or ownership of Infinity or any
of its subsidiaries, except for any such alteration which would not reasonably
be expected to have a Material Adverse Effect on Infinity;

            (e) take any action that would prevent or impede the Merger from
qualifying as a reorganization under Section 368(a) of the Code; or

            (f) take, propose to take, or agree in writing or otherwise to take,
any of the actions described in Sections 5.2(a) through 5.2(e) or any action
which would make any of the representations or warranties of Infinity contained
in this Agreement untrue or incorrect.

      5.3 Preparation of S-4 and the Proxy Statement.

            (a) OSI and Infinity will, as promptly as practicable, prepare and
file with the SEC the Proxy Statement in connection with the vote of the
stockholders of OSI with respect to the Merger and the Information Statement in
connection with the vote of the stockholders of Infinity with respect to the
Share Issuance.

            (b) Infinity will, as promptly as practicable, prepare and,
following receipt of notification from the SEC that it has no further comments
on the Proxy Statement or Information Statement, file with the SEC the S-4 in
connection with the registration under the Securities Act of the shares of
Infinity Common Stock issuable upon conversion of the Shares and the other
transactions contemplated hereby. OSI will have a reasonable opportunity to
review the S-4 and any amendments thereto prior to the filing thereof with the
SEC.

            (c) Infinity and OSI will, and will cause their accountants and
lawyers to, use all reasonable best efforts to have or cause the S-4 declared
effective as promptly as practicable after it is filed, and will take any other
action required or necessary to be taken under federal or state securities Laws
or otherwise in connection with the registration process. OSI will use its
reasonable best efforts to cause the Proxy Statement to be mailed and Infinity
will use its reasonable best efforts to cause the Information Statement to be
mailed, each to its respective shareholders at the earliest practicable date
after the S-4 shall become effective.

      5.4 Stockholder Meetings.

            (a) OSI shall call a meeting of its stockholders (the "OSI
Stockholders Meeting") to be held as promptly as practicable for the purpose of
voting upon this Agreement and the Merger, and shall use its reasonable best
efforts to cause such stockholders' meeting to be held within forty-five (45)
days after the date on which the S-4 is declared effective by the SEC. OSI
agrees that its obligations pursuant to the first sentence of this Section
5.4(a) shall not be affected by the commencement, public proposal, public
disclosure or communication to OSI of any Acquisition Proposal (as


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<PAGE>   47
defined in Section 5.5). The OSI Board will recommend to its stockholders
approval of this Agreement and the Merger and, except as permitted by Section
5.5(b), the OSI Board shall not withdraw, amend or modify in a manner adverse to
Infinity such recommendation (or announce publicly its intention to do so).
Notwithstanding the foregoing, regardless of whether the OSI Board has
withdrawn, amended or modified its recommendation that its stockholders approve
and adopt this Agreement and the Merger, unless this Agreement has been
terminated pursuant to the provisions of Article 7, OSI shall be required to
hold the OSI Stockholders Meeting.

            (b) Infinity shall call a meeting of its stockholders to be held as
promptly as practicable for the purpose of voting upon the Share Issuance, and
shall use its reasonable best efforts to cause such stockholders' meeting to be
held within forty-five (45) days after the date on which the S-4 is declared
effective by the SEC. The Board of Directors of Infinity will recommend to its
stockholders approval of the Share Issuance.

            (c) OSI and Infinity shall coordinate and cooperate with respect to
the timing of such stockholders' meetings and shall use their reasonable efforts
to hold such meetings on the same day.

      5.5 No Solicitation.

            (a) From the date hereof until the termination hereof and except as
expressly permitted by the following provisions of this Section 5.5, OSI will
not, nor will it permit any of its subsidiaries to, nor will it authorize or
permit any officer, director or employee of or any investment banker, attorney,
accountant or other advisor or representative of, OSI or any of its subsidiaries
to, directly or indirectly, (i) solicit, initiate or encourage the submission of
any Acquisition Proposal (as defined in Section 5.5(c)), (ii) participate in any
discussions or negotiations regarding, or furnish to any person any non-public
information with respect to OSI or any of its subsidiaries, or take any other
action to facilitate, any Acquisition Proposal or any inquiries or the making of
any proposal that constitutes, or may reasonably be expected to lead to, any
Acquisition Proposal, (iii) amend or grant any waiver or release under any
standstill or similar agreement with respect to any class of equity securities
of OSI, or (iv) enter into any agreement with respect to an Acquisition Proposal
(other than a confidentiality agreement as described below); provided, however,
that nothing contained in this Section 5.5(a) shall prohibit the OSI Board from
furnishing information to, or entering into discussions or negotiations with,
any person that makes an unsolicited bona fide written offer or proposal that
constitutes an Acquisition Proposal if, and only to the extent that (A) such
action is taken prior to the date on which the OSI Requisite Vote is obtained,
(B) the OSI Board, after consultation with and based upon the advice of outside
legal counsel, determines in good faith that such action is necessary for the
OSI Board to comply with its fiduciary duties to OSI stockholders under
applicable Law, (C) the OSI Board determines in good faith, after consultation
with an independent, nationally recognized financial advisor, that such
Acquisition Proposal, if accepted, constitutes, or is reasonably likely to lead
to, a Superior Proposal (as hereinafter defined), and (D) prior to taking such
action, OSI (x) provides reasonable notice to Infinity to the effect that it is
taking such


                                       39
<PAGE>   48
action and (y) receives from such person an executed confidentiality/ standstill
agreement in reasonably customary form and in any event containing terms at
least as stringent as those contained in the Confidentiality Agreement (as
defined in Section 5.7(d)) as of the date of its execution (it being understood
that such person shall not be released from the standstill obligations set forth
therein solely due to the existence of this Agreement or any modification of
this Agreement proposed by Infinity). For purposes of this Agreement, "Superior
Proposal" means a bona fide written Acquisition Proposal on terms which a
majority of the members of the OSI Board determine in their good faith judgment
(after consultation with an independent, nationally-recognized financial
advisor) and after taking into account all legal, financial, regulatory and
other aspects of the Acquisition Proposal, the person making the proposal, the
strategic benefits to be derived from the Merger and the long-term prospects of
Infinity and its subsidiaries, to be more favorable from a financial point of
view to the Company's stockholders than the Merger, and for which the members of
the OSI Board determine in their good faith judgment (after such consultation)
that financing, to the extent required, is then committed or reasonably
available. Prior to providing any information to or entering into discussions or
negotiations with any person in connection with an Acquisition Proposal by such
person, OSI shall notify Infinity of any Acquisition Proposal (including,
without limitation, the material terms and conditions thereof and the identity
of the person making it) as promptly as practicable after its receipt thereof,
and shall thereafter inform Infinity on a prompt basis of the status of any
discussions or negotiations with such a third party, and any material changes to
the terms and conditions of such Acquisition Proposal. Immediately after the
execution and delivery of this Agreement, OSI will, and will cause its
subsidiaries and affiliates, and their respective officers, directors,
employees, investment bankers, attorneys, accountants and other agents to, cease
and terminate any existing activities, discussions or negotiations with any
parties conducted heretofore with respect to any possible Acquisition Proposal
and shall promptly inform the individuals or entities referred to in the first
sentence hereof of the obligations undertaken in this Section 5.5(a).

            (b) The OSI Board will not withdraw or modify or propose to withdraw
or modify, in a manner adverse to Infinity, its approval or recommendation of
this Agreement or the Merger unless (i) OSI has complied with the terms of
Section 5.5(a), (ii) a Superior Proposal is pending at the time the OSI Board
determines to take any such action, and (iii) the OSI Board, after consultation
with and based upon the advice of outside legal counsel, determines in good
faith that such action is necessary for OSI to comply with the fiduciary duties
to OSI stockholders under applicable Law; provided, however, the OSI Board may
not approve or recommend an Acquisition Proposal (and in connection therewith,
withdraw or modify its approval or recommendation of this Agreement or the
Merger) unless such an Acquisition Proposal is a Superior Proposal (and OSI
shall have first complied with its obligations set forth in Section 7.3(a) and
the time period referred to in the last sentence of Section 7.3(a) has expired)
and unless it shall have first consulted with outside legal counsel and have
determined, based upon such advice, that such action is necessary for the OSI
Board to comply with its fiduciary duties to OSI stockholders. Nothing contained
in this Section 5.5(b) shall prohibit OSI
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<PAGE>   49
from taking and disclosing to its stockholders a position contemplated by Rule
14e-2(a) promulgated under the Exchange Act or from making any disclosure to
OSI's stockholders which, in the good faith reasonable judgment of the OSI
Board, based on the advice of outside legal counsel, is required under
applicable Law; provided, that (i) the OSI Board shall not recommend that the
stockholders of OSI tender their shares in connection with a tender offer except
to the extent the OSI Board by a majority vote determines in its good faith that
such a recommendation is required to comply with the fiduciary duties of the OSI
Board to OSI's stockholders under applicable Law, after receiving the advice of
outside legal counsel and (ii) except as otherwise permitted in this Section
5.5(b), OSI does not withdraw or modify, or propose to withdraw or modify, its
position with respect to the Merger or approve or recommend, or propose to
approve or recommend, an Acquisition Proposal. Nothing in this Section 5.5(b)
shall (i) permit OSI to terminate this Agreement (except as provided in Article
7 hereof) or (ii) affect any other obligations of OSI under this Agreement.

            (c) "Acquisition Proposal" means an inquiry, offer or proposal
regarding any of the following (other than the transactions contemplated by this
Agreement) involving OSI or any of its subsidiaries: (i) any merger,
consolidation, share exchange, recapitalization, business combination or other
similar transaction; (ii) any sale, lease, exchange, mortgage, pledge, transfer
or other disposition of all or substantially all the assets of OSI and its
subsidiaries, taken as a whole, in a single transaction or series of related
transactions; (iii) any tender offer or exchange offer for 20 percent or more of
the outstanding Shares or the filing of a registration statement under the
Securities Act in connection therewith; or (iv) any public announcement of a
proposal, plan or intention to do any of the foregoing or any agreement to
engage in any of the foregoing.

      5.6 Letters of Accountants.

            (a) OSI shall use all reasonable best efforts to cause to be
delivered to Infinity a letter of Deloitte & Touche LLP (or its successor firm),
OSI's independent auditors, dated a date within two (2) business days before the
date on which the S-4 shall become effective and addressed to Infinity, in form
and substance reasonably satisfactory to Infinity and customary in scope and
substance for letters delivered by independent public accountants in connection
with registration statements similar to the S-4.

            (b) Infinity shall use all reasonable best efforts to cause to be
delivered to OSI a letter of KPMG Peat Marwick LLP, Infinity's independent
auditors, dated a date within two (2) business days before the date on which the
S-4 shall become effective and addressed to OSI, in form and substance
reasonably satisfactory to OSI and customary in scope and substance for letters
delivered by independent public accountants in connection with registration
statements similar to the S-4.

      5.7 Access to Information.

            (a) Between the date hereof and the Effective Time, OSI will give to
Infinity and its authorized representatives reasonable access to all employees
(which


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<PAGE>   50
access shall be coordinated with such party's executive management), plants,
offices, warehouses and other facilities and to all books and records of OSI and
its subsidiaries and will permit Infinity to make such inspections as it may
reasonably require. Each of OSI and Infinity will cause its officers and those
of its subsidiaries to furnish the other with such financial and operating data
and other information with respect to the business, properties and personnel of
itself and its subsidiaries as the other may from time to time reasonably
request; provided, that in no event shall Infinity be obligated to provide
information in violation of Law. No investigation made pursuant to this Section
5.7(a) shall affect or be deemed to modify any of the representations or
warranties made by OSI or Infinity in this Agreement.

            (b) Between the date hereof and the Effective Time, each of OSI and
Infinity shall furnish to the other (i) within two business days after the
delivery thereof to management, such monthly financial statements and data as
are regularly prepared for distribution to its Chief Executive Officer and (ii)
at the earliest time at which they are available and prior to filing thereof
with the SEC, such quarterly and annual financial statements as are prepared for
its SEC filings, which shall be in accordance with its books and records, and
drafts of all such SEC filings.

            (c) Each of OSI, Infinity and Burma Acquisition will hold and will
cause its consultants and advisors to hold in confidence all documents and
information concerning the other and the other's subsidiaries furnished to it in
connection with the transactions contemplated by this Agreement to the extent
required by that certain confidentiality agreement entered into between OSI, CBS
Corporation and Infinity dated May 12, 1999 (the "Confidentiality Agreement").

      5.8 Additional Agreements; Reasonable Best Efforts. Subject to the terms
and conditions herein provided, each of the parties hereto agrees to use its
reasonable best efforts to take, or cause to be taken, all action, and to do, or
cause to be done, all things reasonably necessary, proper or advisable under
applicable Laws and regulations to consummate and make effective the
transactions contemplated by this Agreement, including, without limitation, (i)
cooperation in the preparation and filing of the Proxy Statement and the S-4,
any filings that may be required under the HSR Act, and any amendments to any
thereof, (ii) cooperation in obtaining, prior to the Effective Time, the
approval for listing on the NYSE, effective upon the official notice of
issuance, of the shares of Infinity Common Stock into which the Shares will be
converted pursuant to Article 2 hereof, (iii) the taking of all action
reasonably necessary, proper or advisable to secure any necessary consents of
all third parties and Governmental Entities, including those relating to
existing debt obligations of OSI and its subsidiaries, (iv) the transfer of
existing Company Permits to the Surviving Corporation, (v) contesting any legal
proceeding relating to the Merger and the Share Issuance and (vi) the execution
of any additional instruments necessary to consummate the transactions
contemplated hereby. Subject to the terms and conditions of this Agreement,
Infinity, Burma Acquisition and OSI agree to use all reasonable efforts to cause
the Effective Time to occur as soon as practicable after the stockholder votes
with respect to the Merger and the Share Issuance. None of the parties hereto
will take any action which could reasonably be expected to


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<PAGE>   51
hinder, delay or impede the Merger or the Share Issuance. In case at any time
after the Effective Time any further action is necessary to carry out the
purposes of this Agreement, the proper officers and directors of each party
hereto shall take all such necessary action.

      5.9 Regulatory Reviews. Each party hereto will use its reasonable best
efforts (a) to file with the U.S. Department of Justice and U.S. Federal Trade
Commission, as soon as practicable and in no event later than ten (10) days
after the date hereof, the Notification and Report Form under the HSR Act and
any supplemental information or material requested pursuant to the HSR Act, and
(b) to comply as soon as practicable after the date hereof with any other Laws
of any country under which any consent, authorization, registration, declaration
or other action with respect to the transactions contemplated herein may be
required. Each party hereto shall furnish to the other such information and
assistance as the other may reasonably request in connection with any filing or
other act undertaken in compliance with the HSR Act or other such Laws, and
shall keep each other timely apprised of the status of any communications with,
and any inquiries or requests for additional information from, any Governmental
Entity under the HSR Act or other such Laws. Infinity, Burma Acquisition and OSI
will each use its reasonable best efforts to cause termination of the HSR
waiting period(s) in connection with any review of the transactions contemplated
by this Agreement under the HSR Act. In connection with any litigation or
administrative proceeding instituted to prevent the consummation of the Merger,
Infinity, Burma Acquisition and OSI shall take any and all action reasonably
necessary in connection with such litigation or administrative proceeding (i) to
prevent the entry of any order, preliminary or permanent injunction, or other
legal restraint or prohibition preventing consummation of the Merger or any
related transactions contemplated by this Agreement and (ii) to vacate any
order, injunction or legal restraint or prohibition which would prevent the
consummation of the transactions contemplated by this Agreement.

      5.10 Public Announcements. Each of Infinity, Burma Acquisition and OSI
will agree on the text of any press release before issuing any press release or
otherwise making any public statements with respect to the transactions
contemplated by this Agreement, including, without limitation, the Merger. None
of Infinity, Burma Acquisition or OSI shall issue any such press release or make
any such public statement prior to such agreement, except as may be required by
applicable Law or by obligations pursuant to any agreement with the NYSE or
NASDAQ, as determined by Infinity or OSI, as the case may be, in which case such
release or statement shall be limited to a factual summary of the material
provisions of this Agreement and the transactions contemplated hereby.

      5.11 Indemnification; Directors' and Officers' Insurance.

            (a) Infinity, Burma Acquisition and OSI agree that all rights to
exculpation and indemnification for acts or omissions occurring prior to the
Effective Time and advancement of expenses existing on the date of this
Agreement in favor of the current or former directors, officers, employees or
agents of OSI or any of its subsidiaries


                                       43
<PAGE>   52
(the "Indemnified Parties") of OSI as provided in its certificate of
incorporation or bylaws or in any agreement between OSI and any of the
Indemnified Parties shall survive the Merger and shall continue in full force
and effect in accordance with their terms for a period of six (6) years
following the Effective Time, and accordingly during such period, the Surviving
Corporation shall indemnify and advance expenses to the Indemnified Parties to
the same extent as such Indemnified Parties are entitled to indemnification and
advancement of expenses pursuant to the preceding sentence.

            (b) For a period of six (6) years after the Effective Time, Infinity
shall cause to be maintained in effect the policies of directors' and officers'
liability insurance maintained by OSI for the benefit of those persons who are
covered by such policies at the Effective Time (or Infinity may substitute
therefor policies of at least the same coverage with respect to matters
occurring prior to the Effective Time), to the extent that such liability
insurance can be maintained annually at a cost to Infinity not greater than 300
percent of the annual premium (the "Current Premium") for the current OSI
directors' and officers' liability insurance; provided, that if such insurance
cannot be so maintained or obtained at such costs, Infinity shall maintain or
obtain as much of such insurance as can be so maintained or obtained at a cost
equal to 300 percent of the current annual premiums of OSI for such insurance.
OSI represents and warrants to Infinity that the Current Premium is $297,500.

            (c) In addition to the other rights provided for in this Section
5.11 and not in limitation thereof, for six (6) years from and after the
Effective Time, the Surviving Corporation shall, and Infinity shall cause the
Surviving Corporation to, (i) indemnify and hold harmless the Indemnified
Parties against all losses, Expenses (as hereinafter defined), claims, damages,
liabilities, judgments, or, subject to the proviso of the next succeeding
sentence, amounts paid in settlement in respect to any threatened, pending or
completed claim, action, suit or proceeding, whether criminal, civil,
administrative or investigative based on, or arising out of or relating to this
Agreement and the transactions contemplated hereby (an "Indemnifiable Claim")
and (ii) advance to such Indemnified Parties all Expenses incurred in connection
with any Indemnifiable Claim promptly after receipt of reasonably detailed
statements therefor; provided, however, that the Indemnified Party to whom
Expenses are to be advanced provides any affirmation required by the DGCL and an
undertaking to repay such advances if it is ultimately determined by a court of
competent jurisdiction or by independent counsel mutually acceptable to Infinity
and the Indemnified Party, that such Indemnified Party's conduct does not comply
with the standards set forth under the DGCL or is otherwise not entitled to
indemnification from Lightyear or the Surviving Corporation. In the event any
Indemnifiable Claim is asserted or made within such six (6) year period, all
rights to indemnification and advancement of Expenses in respect of any such
Indemnifiable Claim shall continue until such Indemnifiable Claim is disposed of
or all judgments, orders, decrees or other rulings in connection with such
Indemnifiable Claim are fully satisfied; provided, however, that neither
Infinity nor the Surviving Corporation shall be liable for any settlement
effected without its written consent (which consent shall not be unreasonably
withheld or delayed). The Indemnified Parties as a group may retain only


                                       44
<PAGE>   53
one law firm with respect to each related matter except to the extent there is,
in the opinion of counsel to an Indemnified Party, under applicable standards of
professional conduct, a conflict on any significant issue between positions of
any two or more Indemnified Parties. For the purposes of this Section 5.11,
"Expenses" shall include reasonable attorneys' fees and all other costs, charges
and expenses paid or incurred in connection with investigating, defending, being
a witness in or participating in (including on appeal), or preparing to defend,
be a witness in or participate in any Indemnifiable Claim.

            (d) The Surviving Corporation shall, and Infinity shall cause the
Surviving Corporation to, advance all Expenses to any Indemnified Parties
incurred enforcing the indemnity or other obligations provided for in this
Section 5.11.

            (e) The rights of each Indemnified Party under this Section 5.11 are
intended to benefit, and shall be enforceable by, each Indemnified Party and the
heirs, executors, trustees, fiduciaries and administrators of such Indemnified
Party.

            (f) If the Surviving Corporation is financially incapable of
satisfying its obligations under Section 5.11(a) or 5.11(c), Infinity shall
satisfy such obligations.

      5.12 Notification of Certain Matters. OSI, on the one hand, and Infinity
and Burma Acquisition, on the other, shall give prompt notice to each other of
(i) the occurrence or nonoccurrence of any event the occurrence or nonoccurrence
of which would be likely to cause any representation or warranty contained in
this Agreement to be untrue or inaccurate in any material respect at or prior to
the Effective Time, (ii) any material failure of a party to comply with or
satisfy any covenant, condition or agreement to be complied with or satisfied by
it hereunder, (iii) any notice of, or other communication relating to, a default
or event which, with notice or lapse of time or both, would become a default,
received by a party or any of its subsidiaries subsequent to the date of this
Agreement and prior to the Effective Time, under any contract or agreement
material to the financial condition, properties, businesses or results of
operations of a party and its subsidiaries taken as a whole to which it or any
of its subsidiaries is a party or is subject, (iv) any notice or other
communication from any third party alleging that the consent of such third party
is or may be required in connection with the transactions contemplated by this
Agreement, where the failure to obtain the consent, individually or in the
aggregate, would reasonably be expected to have a Material Adverse Effect on the
party receiving such notice of other communication, (v) the occurrence or
non-occurrence of any event the occurrence or non-occurrence of which would be
likely to cause any condition to the obligations of any party to the effect of
the transactions contemplated hereby not to be satisfied, (vi) any notice or
other communication from any Governmental Entity in connection with the Merger
or (vii) any Material Adverse Effect on a party; provided, that the delivery of
any notice pursuant to this Section 5.12 shall not cure such breach or
non-compliance or limit or otherwise affect the remedies available hereunder to
the party receiving such notice.


                                       45
<PAGE>   54
      5.13 Tax-Free Reorganization Treatment. OSI, certain stockholders of OSI,
and Infinity shall execute and deliver to Powell, Goldstein, Frazer & Murphy
LLP, counsel to OSI, and Weil, Gotshal & Manges LLP, counsel to Infinity and
Burma Acquisition, certificates substantially in the forms agreed to prior to
the date hereof at such time or times as may be reasonably requested by such law
firms in connection with their respective deliveries of opinions, pursuant to
Sections 6.2(c) and 6.3(h) hereof, with respect to the Tax-free reorganization
treatment of the Merger. Prior to the Effective Time, none of OSI, Infinity, or
Burma Acquisition shall take or cause to be taken any action which would cause
to be untrue (or fail to take or cause not to be taken any action which would
cause to be untrue) any of the representations in such certificates.

      5.14 OSI Affiliates. Prior to the Closing Date, OSI shall deliver to
Infinity a letter identifying each affiliate (as such term is defined in Rule
12b-2 under the Exchange Act) of OSI at the time the Merger is submitted for
approval to the stockholders of OSI (each a "OSI Affiliate") and OSI shall use
its reasonable best efforts to cause each OSI Affiliate to deliver to Infinity
on or prior to the Closing Date, a written agreement that such OSI Affiliate
will not sell, pledge, transfer or otherwise dispose of any shares of Infinity
Common Stock issued to such OSI Affiliate pursuant to the Merger, except in
compliance with Rule 145 promulgated under the Securities Act, pursuant to an
effective registration statement under the Securities Act or an exemption from
the registration requirements of the Securities Act.

      5.15 SEC Filings. Each of Infinity and OSI shall promptly provide the
other party (or its counsel) with copies of all filings made by the other party
or any of its subsidiaries with the SEC or any other state or federal
Governmental Entity in connection with this Agreement and the transactions
contemplated hereby.

      5.16 Employee Benefits. For a period of one year after the Effective Time,
Infinity will provide each employee (and, to the extent applicable, former
employees) of the Surviving Corporation and its subsidiaries with benefits that,
with respect to such employee (or former employee), are at least substantially
equivalent on an aggregate basis to the benefits received by such employees
immediately prior to the Effective Time (other than any stock option plans).
Without limiting the generality of the foregoing, all vacation, holiday,
sickness and personal days accrued by the employees of OSI and of its
subsidiaries shall be honored. In the event that any employee of the Surviving
Corporation or one of its subsidiaries is at any time after the Effective Time
transferred to Infinity or any affiliate of Infinity or becomes a participant in
an employee benefit plan, program or arrangement maintained by or contributed by
Infinity or any affiliate of Infinity, Infinity shall cause such plan, program
or arrangement to treat the prior service of such employee with OSI or its
subsidiaries as service rendered to Infinity or such affiliates for purposes of
eligibility, vesting, vacation time or severance benefits under such plans.
Infinity shall cause to be waived any pre-existing condition limitation under
their welfare plans that might otherwise apply to such employee or, to the
extent applicable, a former employee. Infinity agrees to recognize (or cause to
be recognized) the dollar amount of all expenses incurred by such employees or,
to the extent applicable, former employees, during the calendar year in which
the Effective Time occurs for


                                       46
<PAGE>   55
purposes of satisfying the calendar year deductibles, co-payment limitations and
lifetime maximums for such year under the relevant benefit plans of Infinity and
its respective subsidiaries. Nothing contained in this Section 5.16 shall be
construed as requiring Infinity to continue any specific OSI Employee Benefit
Plan or to continue the employment of any employee, provided, however, that any
changes that Infinity may make to any such OSI Employee Benefit Plan are
consistent with the prior parts of this Section 5.16, and are permitted by the
terms of the OSI Employee Benefit Plan and under the applicable Law.

      5.17 Registration Rights. Infinity shall enter into a registration rights
agreement substantially in the form attached hereto as Exhibit C with the OSI
stockholders named on the signature pages thereto.

      5.18 Infinity Board of Directors. Infinity shall take all necessary action
to cause Arturo R. Moreno and William S. Levine to be appointed to the Board of
Directors of Infinity as of the Effective Time; one of such individuals shall be
appointed to the class of directors whose term expires in 2001 and the other to
the class of directors whose term expires in 2002 (as such individuals shall
designate prior to the filing of the Proxy Statement with the SEC).

      5.19 Fees and Expenses. Whether or not the Merger is consummated, all
Expenses (as hereinafter defined) incurred in connection with this Agreement,
and the transactions contemplated hereby shall be paid by the party incurring
such Expenses, except (a) Expenses incurred in connection with the filing,
printing and mailing of the Proxy Statement and the S-4, which shall be shared
equally by OSI and Infinity, and (b), if applicable, as provided in Section 7.5.
As used in this Agreement, "Expenses" includes all out-of-pocket expenses
(including, without limitation, all fees and expenses of counsel, accountants,
investment bankers, experts and consultants to a party hereto and its
affiliates) incurred by a party or on its behalf in connection with, or related
to, the authorization, preparation, negotiation, execution and performance of
this Agreement and the transactions contemplated hereby, including the
preparation, filing, printing and mailing of the Proxy Statement and the S-4 and
the solicitation of stockholder approvals and all other matters related to the
transactions contemplated hereby.

      5.20 Antitakeover Statutes. If any Takeover Statute is or may become
applicable to the Merger, each of OSI and Infinity shall take such actions as
are necessary so that the transactions contemplated by this Agreement may be
consummated as promptly as practicable on the terms contemplated hereby and
otherwise act to eliminate or minimize the effects of any Takeover Statute on
the Merger.

      5.21 OSI Board of Directors. From and after the Effective Time, Infinity
shall take all necessary action to cause the Board of Directors to forego any
exercise of the cash-out rights described in Section 7.7(b) of the Outdoor
Systems, Inc. 1996 Omnibus Plan.


                                       47
<PAGE>   56
      5.22 FIRPTA Certificate. At the Closing, OSI shall deliver a certificate
to Infinity, certified by an officer of OSI, that OSI has no nonresident alien
individual or foreign corporation that either held or holds more than 5% of the
OSI Common Stock during the shorter of the periods described in Section
897(c)(1)(A)(ii) of the Code.

                                    ARTICLE 6

                    CONDITIONS TO CONSUMMATION OF THE MERGER

      6.1 Conditions to Each Party's Obligations to Effect the Merger. The
respective obligations of each party hereto to effect the Merger are subject to
the satisfaction at or prior to the Effective Time of the following conditions:

            (a) this Agreement shall have been approved and adopted by the OSI
Requisite Vote;

            (b) the Share Issuance shall have been approved by the Infinity
Requisite Vote;

            (c) no statute, rule, regulation, executive order, decree, ruling or
injunction shall have been enacted, entered, promulgated or enforced by any
United States court or United States governmental authority and continued in
effect which prohibits, restrains, enjoins or restricts the consummation of the
Merger;

            (d) any waiting period (including any extension thereof) applicable
to the Merger under the HSR Act shall have terminated or expired;

            (e) there shall not be pending or threatened by any Governmental
Entity any suit, action or proceeding, in each case (i) seeking to restrain or
prohibit the consummation of the Merger or any of the other transactions
contemplated by this Agreement or seeking to obtain from OSI or Infinity any
damages that are material in relation to OSI and its subsidiaries taken as a
whole or Infinity and its subsidiaries taken as a whole, as applicable, or (ii)
which otherwise could reasonably be expected to have a Material Adverse Effect
on OSI or a Material Adverse Effect on Infinity; and

            (f) if required for the consummation of the Merger under applicable
Law, Infinity shall have either received a receipt issued under subsection 13(1)
of the Canada Act certifying that a complete notice in prescribed form in
respect of the Merger has been received and advising that the Merger is not
reviewable; or a notice from the Minister, designated by the Governor in Council
as the Minister for the purposes of the Investment Canada Act, issued under Part
IV of the Canada Act, indicating that such Minister is, or is deemed to be,
satisfied that the Merger is likely to be of net benefit to Canada.

            (g) the S-4 shall have become effective under the Securities Act and
shall not be the subject of any stop order or proceedings seeking a stop order
and Infinity shall


                                       48
<PAGE>   57
have received all state securities Laws or "blue sky" permits and authorizations
necessary to issue shares of Infinity Common Stock in exchange for the Shares in
the Merger;

            (h) the Infinity Common Stock issuable in the Merger shall have been
authorized for listing on the NYSE, subject to official notice of issuance; and

            (i) if required for the consummation of the Merger under applicable
Law, the parties shall have obtained the favorable opinion of the Comision
Federal de Competencia.

      6.2 Conditions to the Obligations of OSI. The obligation of OSI to effect
the Merger is subject to the satisfaction at or prior to the Effective Time of
the following conditions:

            (a) the representations and warranties of Infinity and Burma
Acquisition contained in this Agreement shall have been and shall be true and
correct, in each case when made and on and as of the Closing Date as though made
on and as of the Closing Date (except for representations and warranties made as
of a specified date, which need be true and correct, or true and correct only as
of the specified date), without giving effect to any "materiality" or "Material
Adverse Effect" qualifiers contained in such representations and warranties,
with such exceptions as have not had and would not reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on Infinity,
and at the Closing, Infinity and Burma Acquisition shall have delivered to OSI a
certificate executed by a senior executive officer of Infinity (the "Infinity
Closing Certificate") to that effect;

            (b) each of the obligations of Infinity and Burma Acquisition to be
performed at or before the Effective Time pursuant to the terms of this
Agreement shall have been duly performed in all material respects at or before
the Effective Time, and the Infinity Closing Certificate shall certify the
foregoing;

            (c) OSI shall have received an opinion of Powell, Goldstein, Frazer
& Murphy LLP, dated the Closing Date, to the effect that the Merger will be
treated for federal income Tax purposes as a reorganization within the meaning
of Section 368(a) of the Code. In rendering such opinion, Powell, Goldstein,
Frazer & Murphy LLP shall have received and may rely upon the representations
contained in the certificates referred to in Section 5.13; and

            (d) there shall not be any Material Adverse Effect on Infinity, and
the Infinity Closing Certificate shall certify the foregoing; provided, that for
purposes of this Section 6.2(d), any event, change, occurrence, development,
circumstance or effect resulting from or relating to (x) compliance with the
Confidentiality Agreement (as defined in Section 5.7(c)) with respect to the
public announcement or disclosure of the negotiations leading to the execution
of this Agreement, (y) the execution and delivery of this Agreement or (z) any
action taken or omitted by Infinity at the direction of OSI in


                                       49
<PAGE>   58
compliance with the terms and conditions of this Agreement, shall not constitute
a Material Adverse Effect on Infinity.

      6.3 Conditions to the Obligations of Infinity and Burma Acquisition. The
respective obligations of Infinity and Burma Acquisition to effect the Merger
are subject to the satisfaction at or prior to the Effective Time of the
following conditions:

            (a) the representations and warranties of OSI contained in this
Agreement shall have been and shall be true and correct in all material
respects, in each case when made and on and as of the Closing Date as though
made on and as of the Closing Date (except for representations and warranties
made as of a specified date, which need be true and correct, or true and correct
only as of the specified date), without giving effect to any "materiality" or
"Material Adverse Effect" qualifiers contained in such representations and
warranties, with such exceptions as have not and would not reasonably be
expected to have, individually or in the aggregate, a Material Adverse Effect on
OSI, and at the Closing, OSI shall have delivered to Infinity and Burma
Acquisition a certificate executed by a senior executive officer of OSI (the
"OSI Closing Certificate") to that effect;

            (b) the representation and warranty of OSI contained in Section 3.9
of this Agreement shall have been and shall be true and correct when made and on
and as of the Closing Date as though made on and as of the Closing Date, and the
OSI Closing Certificate shall certify the foregoing (it being understood that a
suit, claim, action, proceeding or investigation (excluding any matter set forth
in Section 3.9 of the OSI Disclosure Schedule, each, a "Litigation Matter")
shall not be deemed "material" for purposes of Section 3.9 of this Agreement
unless Infinity's outside counsel has (or have) advised Infinity that such
Litigation Matter, taken individually or in the aggregate with all other
Litigation Matters is reasonably likely to result in judgments (or equitable
remedies) against OSI or any of its subsidiaries (or reasonably likely to have
an adverse economic effect on OSI or any of its subsidiaries) in excess of $30
million (net of third party insurance reasonably expected to be recovered in
respect thereof);

            (c) the representations and warranties of OSI contained in Sections
3.8(k) and (l), 3.10 (solely insofar as the matters set forth therein relate to
or affect Real Property Rights) and 3.15 (solely insofar as the matters set
forth therein relate to or affect Real Property Rights) of this Agreement shall
have been and shall be true and correct when made and on and as of the Closing
Date, without giving effect to any "materiality" or "Material Adverse Effect"
qualifiers contained in such representations and warranties, with such
exceptions as have not and would not reasonably be expected to, individually or
in the aggregate, reduce, prior to the second anniversary of the Effective Time,
the EBITDA of OSI and its subsidiaries, taken as a whole, by $15 million or more
on an annualized basis giving reasonable pro forma effect to new builds, and the
OSI Closing Certificate shall certify the foregoing (it being understood that
the matters set forth in Section 6.3(c) of the OSI disclosure Schedule shall not
be taken into account in determining whether this condition has been satisfied);


                                       50
<PAGE>   59
            (d) each of the obligations of OSI to be performed at or before the
Effective Time pursuant to the terms of this Agreement shall have been duly
performed in all material respects at or before the Effective Time, and the OSI
Closing Certificate shall certify the foregoing;

            (e) the Stockholders Agreement shall be in full force and effect;

            (f) Arturo R. Moreno shall have entered into an employment and
non-competition agreement substantially on the terms set forth in the term sheet
with respect thereto dated the date hereof, such agreement shall be in full
force and effect and Infinity shall not be aware of any basis that would
reasonably be expected to cause such agreement to no longer be in full force and
effect;

            (g) [Intentionally Omitted];

            (h) Infinity shall have received an opinion of Weil, Gotshal &
Manges LLP, dated the Closing Date to the effect that the Merger will be treated
for federal income Tax purposes as a reorganization within the meaning of
Section 368(a) of the Code. In rendering such opinion, Weil, Gotshal & Manges
LLP shall have received and may rely upon the representations contained in the
certificates referred to in Section 5.13; and

            (i) There shall not be any Material Adverse Effect on OSI, and the
OSI Closing Certificate shall certify the foregoing; provided, that for purposes
of this Section 6.3(i), any event, change, occurrence, development, circumstance
or effect resulting from or relating to (x) compliance with the Confidentiality
Agreement with respect to the public announcement or disclosure of the
negotiations leading to the execution of this Agreement, (y) the execution and
delivery of this Agreement or (z) any action taken or omitted by OSI at the
direction of Infinity in compliance with the terms and conditions of this
Agreement, shall not constitute a Material Adverse Effect on OSI.

                                   ARTICLE 7

                         TERMINATION; AMENDMENT; WAIVER

      7.1 Termination by Mutual Agreement. This Agreement may be terminated and
the Merger may be abandoned at any time prior to the Effective Time by the
mutual written consent of Infinity and OSI by action of their respective Board
of Directors.

      7.2 Termination by Either Infinity or OSI. This Agreement may be
terminated and the Merger may be abandoned at any time prior to the Effective
Time by action of the Board of Directors of either Infinity or OSI if:

            (a) the Merger shall not have been consummated by December 31, 1999
(the "Termination Date"); provided, however, that if either Infinity or OSI
determines that additional time is necessary in connection with obtaining any
consent, registration,


                                       51
<PAGE>   60
approval, permit or authorization required to be obtained from any Governmental
Entity, the Termination Date may be extended by Infinity or OSI from time to
time by written notice to the other party to a date not beyond February 28,
2000;

            (b) the OSI Requisite Vote shall not have been obtained at the OSI
Stockholders Meeting or at any adjournment or postponement thereof;

            (c) the Share Issuance shall not have been approved by the Infinity
Requisite Vote; or

            (d) any injunction, order, decree or ruling permanently restraining,
enjoining or otherwise prohibiting consummation of the Merger shall become final
and non-appealable, or any statute, law, regulation or ordinance permanently
restraining, enjoining or otherwise prohibiting consummation of the Merger shall
be adopted;

provided, that the right to terminate this Agreement pursuant to this Section
7.2 shall not be available to any party that has breached in any material
respect its obligations under this Agreement in any manner that shall have
proximately contributed to the occurrence of the failure of the Merger to be
consummated.

      7.3 Termination by OSI. This Agreement may be terminated and the Merger
may be abandoned at any time prior to the Effective Time by action of the OSI
Board if:

            (a) (i) OSI is not in breach of Section 5.5, (ii) the Merger shall
not have been approved by the OSI Requisite Vote, (iii) the OSI Board shall have
determined in good faith, based on the advice of outside legal counsel, that it
is necessary, in order to comply with its fiduciary duties to OSI's stockholders
under applicable Law, to terminate this Agreement to enter into an agreement
with a third party with respect to or to consummate a transaction constituting a
Superior Proposal, (iv) the OSI Board authorizes OSI, subject to complying with
the terms of this Agreement, to enter into a binding written agreement with a
third party concerning a transaction that constitutes a Superior Proposal and
OSI notifies Infinity in writing (the "Notice") that it intends to enter into
such an agreement (it being understood that OSI shall be required to deliver a
new Notice in respect of any revised Superior Proposal from such third party or
its affiliates that OSI proposes to accept), attaching the most current version
(or draft) of such agreement to such Notice (which version (or draft) shall be
updated on a current basis), and (v) during the five business day (or, in the
case of any Notice with respect to a particular third party other than the
initial Notice with respect to such third party's Acquisition Proposal, three
business day) period after delivery of the Notice, OSI shall have negotiated
with, and shall have caused its respective financial and legal advisors to,
negotiate with Infinity to attempt to make such commercially reasonable
adjustments in the terms and conditions of this Agreement as would enable OSI to
proceed with the transactions contemplated herein and (vi) the OSI Board shall
have concluded, after considering the results of such negotiations, that any
Superior Proposal giving rise to OSI's Notice continues to be a Superior
Proposal. OSI may not effect any termination pursuant to this Section 7.3(a)
unless (i) prior thereto or concurrently therewith OSI pays to Infinity in
immediately


                                       52
<PAGE>   61
available funds the fees required to be paid pursuant to Section 7.5 and (ii)
such termination is within two business days after the termination of the five
(or, if applicable, three) business day period referred to in clause (v) above.
OSI agrees (x) that it will not enter into a binding agreement referred to in
clause (iii) above until at least the first business day after the five (or, if
applicable, three) business day period referred to in clause (v) above, and (y)
to notify Infinity promptly if its intention to enter into a written agreement
referred to in its Notice shall change at any time after giving such
notification; or

            (b) there is a breach by Infinity or Burma Acquisition of any
representation, warranty, covenant or agreement contained in this Agreement that
would give rise to a failure of a condition set forth in Section 6.2(a) or
6.2(b), which has not been cured within 15 business days following receipt by
Infinity and Burma Acquisition of written notice of such breach; or

            (c) the Board of Directors of Infinity shall have failed to call the
meeting of Infinity stockholders in accordance with Section 5.4(b), other than
if the calling thereof is subject to an existing injunction or restraining order
or if the S-4 has not been declared effective (other than as a result of a
breach of this Agreement by Infinity (and Infinity's stockholders shall not have
otherwise consented to the Share Issuance in accordance with Section 228 of the
DGCL).

      7.4 Termination by Infinity. This Agreement may be terminated and the
Merger may be abandoned at any time prior to the Effective Time by action of the
Infinity Board if:

            (a) (i) OSI enters into a binding agreement for a Superior Proposal,
or (ii) the OSI Board, whether or not permitted to do so by this Agreement, (A)
shall have withdrawn or adversely modified its approval, or recommendation of
this Agreement or the Merger, or (B) shall have failed to call the meeting of
OSI stockholders in accordance with Section 5.4(a), other than, in the case of
Clause (B), if the calling thereof is subject to an existing injunction or
restraining order or if the S-4 has not been declared effective (other than as a
result of the breach of this Agreement by OSI); or

            (b) there is a breach by OSI of any representation, warranty,
covenant or agreement contained in this Agreement would give rise to a failure
of a condition set forth in Section 6.3(a), 6.3(b), 6.3(c) or 6.3(d), which has
not been cured within 15 business days following receipt by OSI of written
notice of such breach.

      7.5 Effect of Termination and Abandonment.

            (a) In the event of termination of this Agreement and the
abandonment of the Merger pursuant to this Article 7, this Agreement (other than
this Section 7.5 and Sections 5.7(c), 5.19 and Article 8) shall become void and
of no effect with no liability on the part of any party hereto (or of any of its
directors, officers, employees, agents, legal and financial advisors or other
representatives); provided, however, except as


                                       53
<PAGE>   62
otherwise provided herein, neither such termination nor the existence of any
rights provided for in Section 7.5(b) shall relieve any party hereto of any
liability or eliminate or reduce any damages resulting from (i) any willful
breach of any representations or warranties contained in this Agreement or (ii)
any breach of any covenant or agreement contained in this Agreement.

            (b) (i) In the event that (A) this Agreement is terminated by OSI
      pursuant to Section 7.3(a), or by Infinity pursuant to Section 7.4(a), or
      (B) OSI gives a Notice pursuant to Section 7.3(a) and this Agreement is
      thereafter terminated by Infinity or OSI pursuant to Section 7.2(b), then
      OSI shall pay Infinity a termination fee of $300 million in same-day funds
      (the "Fee"), on the date of such termination.

            (ii) In the event that this Agreement is terminated by (A) by either
      Infinity or OSI pursuant to Section 7.2(b) (other than in the
      circumstances described in Section 7.5(b)(i)(B)) or (B) by Infinity
      pursuant to Section 7.4(b) and, within 18 months of any such termination,
      any Acquisition Proposal (whether received prior to or after such
      termination) is entered into, agreed to or consummated by OSI, then OSI
      shall pay to Infinity the Fee, on the earlier of the date an agreement is
      entered into with respect to an Acquisition Proposal or an Acquisition
      Proposal is consummated.

            (c) OSI acknowledges that the agreements contained in Section 7.5(b)
are an integral part of the transactions contemplated by this Agreement, and
that, without these agreements, Infinity and Burma Acquisition would not have
entered into this Agreement; accordingly, if OSI fails to promptly pay the
amount due pursuant to Section 7.5(b), and, in order to obtain such payment,
Infinity commences a suit which results in a judgment against OSI for the fee
set forth in this Section 7.5, OSI shall pay to Infinity its costs and expenses
(including attorney's fees) in connection with such suit, together with interest
from the date of termination of this Agreement on the amounts owed at the prime
rate of Citibank, N.A. in effect from time to time during such period plus two
percent.

            (d) In the event of termination of this Agreement and abandonment of
the Merger pursuant to and in compliance with this Article 7 (other than
pursuant to Section 7.4(b)), Infinity and Burma Acquisition each agree that from
the date of such termination until the first anniversary of the date of such
termination (the "Standstill Period") they will not, collectively or
individually, and will cause their respective affiliates (as such term is
defined in Rule 12b-2 under the Exchange Act (each an "Infinity Affiliate" and
collectively the "Infinity Affiliates") not to, collectively or individually, in
any manner, directly or indirectly, unless such shall have been specifically
approved or requested by OSI, (a) effect or seek, offer or propose (whether
publicly or otherwise) to effect, or cause or participate in or in any way
assist or participate in, (i) any acquisition of any securities (or beneficial
ownership thereof) or assets of OSI or any of its subsidiaries, (ii) any tender
or exchange offer, merger or other business combination involving OSI or any of
its subsidiaries; (iii) any recapitalization, restructuring, liquidation,
dissolution or other extraordinary transaction with respect to OSI or any of its
subsidiaries; or (iv) any


                                       54
<PAGE>   63
"solicitation" of "proxies" (as such terms are used in the proxy rules of the
SEC) or consent to vote any voting securities of OSI; or (b) otherwise act,
alone or in concert with others, to seek to control or influence OSI's
management, the OSI Board or policies of OSI (any of the foregoing transactions
hereinafter being referred to as a "Change of Control Transaction").
Notwithstanding the foregoing, the provisions of this paragraph shall cease to
be effective with respect to OSI and any of its subsidiaries upon (A) the
commencement by OSI or any of its subsidiaries, whether voluntarily or
involuntarily, of any proceeding under 11 U.S.C. Section 101 et seq., (B) the
initiation (or public announcement of an intent to initiate) by any person or
group other than or involving Infinity, Burma Acquisition or any Infinity
Affiliate of any action, proceeding or undertaking with respect to OSI or any of
its subsidiaries that would have the effect of a Change of Control Transaction
or any other transaction that, if consummated, would have the effect of a Change
of Control Transaction with respect to such entity. Infinity hereby specifically
acknowledges and agrees that it shall be responsible for any breach of this
Section 7.5(d) by any Infinity Affiliate.

      7.6 Amendment. This Agreement may be amended by action taken by OSI,
Infinity and Burma Acquisition at any time before or after approval of the
Merger by the shareholders of OSI but, after any such approval, no amendment
shall be made which requires the approval of such shareholders under applicable
Law without such approval. This Agreement may not be amended except by an
instrument in writing signed on behalf of the parties hereto.

      7.7 Extension; Waiver. At any time prior to the Effective Time, each party
hereto (for these purposes, Infinity and Burma Acquisition shall together be
deemed one party and OSI shall be deemed the other party) may (i) extend the
time for the performance of any of the obligations or other acts of the other
party, (ii) waive any inaccuracies in the representations and warranties of the
other party contained herein or in any document, certificate or writing
delivered pursuant hereto or (iii) waive compliance by the other party with any
of the agreements or conditions contained herein. Any agreement on the part of
either party hereto to any such extension or waiver shall be valid only if set
forth in an instrument in writing signed on behalf of such party. The failure of
either party hereto to assert any of its rights hereunder shall not constitute a
waiver of such rights.

                                    ARTICLE 8

                                  MISCELLANEOUS

      8.1 Nonsurvival of Representations and Warranties. The representations and
warranties made herein shall not survive beyond the Effective Time or a
termination of this Agreement.


                                       55
<PAGE>   64
      8.2 Entire Agreement; Assignment. This Agreement:

            (a) constitutes the entire agreement between the parties hereto with
respect to the subject matter hereof and supersedes all other prior agreements
and understandings, both written and oral, between the parties with respect to
the subject matter hereof; and

            (b) shall not be assigned by operation of Law or otherwise.

      8.3 Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly given upon receipt) by delivery in person, by cable,
telegram, confirmed facsimile or telex, or by first class mail (postage prepaid,
return receipt requested), to the other party as follows:

      if to Infinity or Burma Acquisition to: Infinity Broadcasting
                                              Corporation
                                              40 West 57th Street
                                              New York, New York  10011
                                              Attention: Farid Suleman
                                              Facsimile: (212) 314-9336

      With copies to:                         CBS Corporation
                                              51 West 52nd Street
                                              New York, New York  10019
                                              Attention: General Counsel
                                              Facsimile: (212) 597-4031

                                              and

                                              Weil, Gotshal & Manges LLP
                                              767 Fifth Avenue
                                              New York, New York  10153
                                              Attention: Howard Chatzinoff, Esq.
                                              Facsimile: (212) 310-8007

      if to OSI to:                           Outdoor Systems, Inc.
                                              2502 N. Black Canyon Highway
                                              Phoenix, Arizona  85009
                                              Attention: William Levine
                                              Facsimile: (602) 248-0884

      With a copy to:                         Powell, Goldstein, Frazer &
                                              Murphy LLP
                                              Sixteenth Floor
                                              191 Peachtree Street, N.E.
                                              Atlanta, Georgia 30303
                                              Attention: William B. Shearer,
                                                         Jr., Esq.
                                              Facsimile: (404) 572-5958




                                       56
<PAGE>   65
or to such other address as the person to whom notice is given may have
previously furnished to the other in writing in the manner set forth above.

      8.4 Governing Law. Except to the extent that Delaware Law is mandatorily
applicable to the Merger and the rights of the shareholders of OSI, this
Agreement shall be governed by and construed in accordance with the Laws of the
State of New York, without regard to the principles of conflicts of Law thereof.

      8.5 Descriptive Headings. The descriptive headings herein are inserted for
convenience of reference only and are not intended to be part of or to affect
the meaning or interpretation of this Agreement.

      8.6 Parties in Interest. This Agreement shall be binding upon and inure
solely to the benefit of each party hereto and its successors and permitted
assigns, and except as provided in Section 5.11, nothing in this Agreement,
express or implied, is intended to or shall confer upon any other person any
rights, benefits or remedies of any nature whatsoever under or by reason of this
Agreement.

      8.7 Severability. If any term or other provision of this Agreement is
invalid, illegal or unenforceable, all other provisions of this Agreement shall
remain in full force and effect so long as the economic or legal substance of
the transactions contemplated hereby is not affected in any manner materially
adverse to any party.

      8.8 Specific Performance. The parties hereto acknowledge that irreparable
damage would result if this Agreement were not specifically enforced, and they
therefore consent that the rights and obligations of the parties under this
Agreement may be enforced by a decree of specific performance issued by a court
of competent jurisdiction. Such remedy shall, however, not be exclusive and
shall be in addition to any other remedies which any party may have under this
Agreement or otherwise.

      8.9 Brokers. In the event the Merger is not consummated, OSI agrees to
indemnify and hold harmless Infinity and Burma Acquisition, and Burma
Acquisition agrees to indemnify and hold harmless OSI, from and against any and
all liability to which Infinity and Burma Acquisition, on the one hand, or OSI,
on the other hand, may be subjected by reason of any broker's, finder's or
similar fees or expenses with respect to the transactions contemplated by this
Agreement to the extent such similar fees and expenses are attributable to any
action undertaken by or on behalf of OSI, or Infinity or Burma Acquisition, as
the case may be.

      8.10 Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed to be an original, but all of which
shall constitute one and the same agreement.


                                       57
<PAGE>   66
      8.11 Interpretation.

            (a) The words "hereof," "herein" and "herewith" and words of similar
import shall, unless otherwise stated, be construed to refer to this Agreement
as a whole and not to any particular provision of this Agreement, and article,
section, paragraph, exhibit and schedule references are to the articles,
sections, paragraphs, exhibits and schedules of this Agreement unless otherwise
specified. Whenever the words "include," "includes" or "including" are used in
this Agreement, they shall be deemed to be followed by the words "without
limitation." All terms defined in this Agreement shall have the defined meanings
contained herein when used in any certificate or other document made or
delivered pursuant hereto unless otherwise defined therein. The definitions
contained in this Agreement are applicable to the singular as well as the plural
forms of such terms and to the masculine as well as to the feminine and neuter
genders of such terms. Any agreement, instrument or statute defined or referred
to herein or in any agreement or instrument that is referred to herein means
such agreement, instrument or statute as from time to time, amended, qualified
or supplemented, including (in the case of agreements and instruments) by waiver
or consent and (in the case of statutes) by succession of comparable successor
statutes and all attachments thereto and instruments incorporated therein.
References to a person are also to its permitted successors and assigns.

            (b) The phrases "the date of this Agreement," "the date hereof" and
terms of similar import, unless the context otherwise requires, shall be deemed
to refer to May 27, 1999.

            (c) "know" or "knowledge" means, with respect to Infinity, the
actual knowledge of the persons listed on Section 8.11(c) of the Infinity
Disclosure Schedule and, with respect to OSI, the actual acknowledge of the
persons listed on Section 8.11(c) of the OSI Disclosure Schedule.

            (d) The term "Material Adverse Effect" means, with respect to any
entity, any event, change, occurrence, development, circumstance or effect that,
individually or in the aggregate with all other events, changes, occurrences,
developments, circumstances and effects, is or would reasonably be expected to
be materially adverse to (i) the assets, properties, condition (financial or
otherwise), business or results of operations of such entity and its
subsidiaries taken as a whole or (ii) the ability of such party to consummate
the transactions contemplated by this Agreement.

            (e) The parties have participated jointly in the negotiation and
drafting of this Agreement. In the event an ambiguity or question of intent or
interpretation arises, this Agreement shall be construed as if drafted jointly
by the parties and no presumption or burden of proof shall arise favoring or
disfavoring any party by virtue of the authorship of any provisions of this
Agreement.


                                       58
<PAGE>   67
            IN WITNESS WHEREOF, each of the parties has caused this Agreement to
be duly executed on its behalf as of the day and year first above written.

                                        INFINITY BROADCASTING CORPORATION



                                        By: /s/ Farid Suleman
                                            ____________________________________
                                            Name: Farid Suleman
                                            Title: Executive Vice President,
                                                   Chief Financial Officer
                                                   and Treasurer


                                        BURMA ACQUISITION CORP.



                                        By: /s/ Farid Suleman
                                            ____________________________________
                                            Name: Farid Suleman
                                            Title: Executive Vice President,
                                                   Chief Financial Officer
                                                   and Treasurer


                                        OUTDOOR SYSTEMS, INC.


                                        By: /s/ William S. Levine
                                            ____________________________________
                                            Name: William S. Levine
                                            Title: Chairman of the Board



                                       59

<PAGE>   1
                                                                    Exhibit 99.2

                                                                  EXECUTION COPY

                             STOCKHOLDERS AGREEMENT

         AGREEMENT dated May 27, 1999 among INFINITY BROADCASTING CORPORATION, a
Delaware corporation ("Infinity"), LEVINE INVESTMENTS LIMITED PARTNERSHIP, an
Arizona limited partnership, BRN PROPERTIES LIMITED PARTNERSHIP, an Arizona
limited partnership, Arturo R. Moreno, Carole D. Moreno and William S. Levine
(each a "Stockholder," and collectively, the "Stockholders").

                              W I T N E S S E T H:

         WHEREAS, concurrently herewith, Infinity, Burma Acquisition Corp., a
Delaware corporation and a wholly-owned subsidiary of Infinity ("Burma
Acquisition") and Outdoor Systems, Inc., a Delaware corporation ("OSI"), are
entering into an Agreement and Plan of Merger (as such agreement may hereafter
be amended from time to time, the "Merger Agreement"; capitalized terms used and
not defined herein have the respective meanings ascribed to them in the Merger
Agreement), pursuant to which Burma Acquisition will be merged with and into OSI
and OSI shall continue as the surviving corporation (the "Merger");

         WHEREAS, as an inducement and a condition to entering into the Merger
Agreement, Infinity and Burma Acquisition have required that the Stockholders
agree, and the Stockholders have agreed, to enter into this Agreement;

         NOW, THEREFORE, in consideration of the foregoing and the mutual
premises, representations, warranties, covenants and agreements contained
herein, the parties hereto, intending to be legally bound, hereby agree as
follows:

         1. Definitions. For purposes of this Agreement:

         (a) "OSI Common Stock" shall mean at any time, collectively, the Common
Stock, par value $.01 per share, of OSI. In the event of a stock dividend or
distribution, or any change in the OSI Common Stock by reason of any stock
dividend, split-up, recapitalization, combination, exchange of shares or the
like, the term "OSI Common Stock" shall be deemed to refer to and include all
such stock dividends and distributions and any shares into which or for which
any or all of the shares of OSI Common Stock may be changed or exchanged.

         (b) "Person" shall mean an individual, corporation, partnership,
limited liability company, joint venture, association, trust, unincorporated
organization or other entity.

         (c) "Beneficially Own" or "Beneficial Ownership" with respect to any
securities shall mean having "beneficial ownership" of such securities (as
determined pursuant to Rule 13d-3 under the Securities Exchange Act of 1934, as
amended (the "Exchange Act")), including pursuant to any agreement, arrangement
or understanding, whether or not in writing. Without duplicative counting of the
same securities by the same holder, securities Beneficially Owned by a Person
shall include securities
<PAGE>   2
Beneficially Owned by all other Persons with whom such Person would constitute a
"group" within the meaning of Section 13(d)(3) of the Exchange Act.

         2. Provisions Concerning OSI Common Stock. Each Stockholder hereby
agrees that during the period commencing on the date hereof and continuing until
the first to occur of the Effective Time or termination of the Merger Agreement
in accordance with its terms, at any meeting of the holders of OSI Common Stock,
however called, or in connection with any written consent of the holders of OSI
Common Stock, such Stockholder shall (x) vote (or cause to be voted) all Owned
Shares (as hereinafter defined) and all shares of OSI Common Stock such
Stockholder may acquire after the date of this Agreement as a result of exercise
of stock options or otherwise, and (y) exercise their rights to vote (or cause
to be voted) the M-K Link Shares (as hereinafter defined) pursuant to the M-K
Link Stockholders' Agreement (as hereinafter defined) in the following manner:
(i) in favor of the Merger, and the Merger Agreement and the approval of the
terms thereof and each of the other actions contemplated by the Merger Agreement
and this Agreement and any actions required in furtherance thereof and hereof;
(ii) against any action or agreement that would result in a breach in any
respect of any covenant, representation or warranty or any other obligation or
agreement of OSI under the Merger Agreement or this Agreement; and (iii) except
as otherwise expressly agreed to in writing in advance by Infinity, against (A)
any extraordinary corporate transaction, such as a merger, consolidation or
other business combination involving OSI or its subsidiaries (other than the
Merger and the transactions contemplated by the Merger Agreement); (B) a sale,
lease or transfer of a material amount of assets of OSI or its subsidiaries, or
a reorganization, recapitalization, dissolution or liquidation of OSI or its
Subsidiaries; (C) any change in a majority of the persons who constitute the
board of directors of OSI; (D) any change in the present capitalization of OSI,
or any amendment of OSI's certificate of incorporation or bylaws; (E) any other
material change in OSI's corporate structure or business; or (F) any other
action involving OSI or its subsidiaries which is intended, or could in any
manner be expected, to impede, interfere with, delay, postpone, or adversely
affect the Merger and the transactions contemplated by this Agreement and the
Merger Agreement including, without limitation, any action to approve or
facilitate any other Acquisition Proposal (as defined in Section 5.5(c) of the
Merger Agreement). No Stockholder shall enter into any agreement or
understanding with any person or entity the effect of which would be
inconsistent with or violative of the provisions and agreements contained in
this Section 2.

         3. Additional Agreements of CEO. Arturo R. Moreno ("CEO") holds validly
issued and outstanding options (the "CEO Options") to acquire 17,642,632 shares
of OSI Common Stock, of which options to purchase 15,063,578 shares are
currently exercisable. CEO shall not exercise the CEO Options prior to the
Effective Time.

         4. Other Covenants, Representations and Warranties of the Stockholders.
Each Stockholder hereby covenants, represents and warrants to Infinity as
follows:

         (a) Ownership of Shares. (i) Such Stockholder is the beneficial owner
of the number of shares of OSI Common Stock set forth opposite such
Stockholder's name


                                       2
<PAGE>   3
on Schedule I hereto under the heading "Owned Shares" (collectively, the "Owned
Shares"). On the date hereof, the number of shares set forth opposite such
Stockholder's name on Schedule I hereto under the heading "Owned Shares"
constitute all of the shares of OSI Common Stock beneficially owned by such
Stockholder, except for up to 321,000 shares held by the William S. and Ina
Levine Foundation and up to 50,000 shares held by the Arturo R. and Carole
Moreno Foundation. With respect to such Stockholder's Owned Shares, such
Stockholder has sole voting power and sole power to issue instructions with
respect to the matters set forth in Section 2 hereof, sole power of disposition
and sole power to agree to all of the matters set forth in this Agreement, with
no limitations, qualifications or restrictions on such rights, subject to
applicable securities laws and the terms of this Agreement, except that CEO
shares such power with his spouse, as joint tenants with right of survivorship,
with respect to 3,429,396 Owned Shares, as indicated on Schedule I hereto.

         (ii) The Stockholders have the right to vote the shares of OSI Common
Stock owned by M-K Link Investments Limited Partnership and certain transferees
thereof (collectively, "M-K Link") (such shares of OSI Common Stock owned by M-K
Link are hereinafter referred to as the "M-K Link Shares") pursuant to the
Stockholders' Agreement dated as of April 15, 1996, among William S. Levine, CEO
and M-K Link, as amended (the "M-K Link Stockholders' Agreement"). To the best
knowledge of the Stockholders, as of the date hereof, the numbers of M-K Link
Shares remaining subject to the M-K Link Stockholders' Agreement is as set forth
on Schedule I.

         (b) Power; Binding Agreement. Such Stockholder has the legal capacity,
power and authority to enter into and perform all of such Stockholder's
obligations under this Agreement. The execution, delivery and performance of
this Agreement by such Stockholder will not violate any other agreement to which
such Stockholder is a party including, without limitation, any voting agreement,
partnership agreement, stockholders agreement (including the M-K Link
Stockholders' Agreement) or voting trust. This Agreement has been duly and
validly executed and delivered by such Stockholder and constitutes a valid and
binding agreement of such Stockholder, enforceable against such Stockholder in
accordance with its terms. There is no beneficiary or holder of a voting trust
certificate or other interest of any trust of which such Stockholder is trustee
whose consent is required for the execution and delivery of this Agreement or
the consummation by such Stockholder of the transactions contemplated hereby. If
such Stockholder is married and such Stockholder's Owned Shares constitute
community property, this Agreement has been duly authorized, executed and
delivered by, and constitutes a valid and binding agreement of, such
Stockholder's spouse, enforceable against such person in accordance with its
terms.

         (c) No Conflicts. Except for filings, permits, authorizations, consents
and approvals under the federal securities laws and the HSR Act, if applicable,
(i) no filing with, and no permit, authorization, consent or approval of, any
state or federal public body or authority is necessary for the execution of this
Agreement by such Stockholder and the consummation by such Stockholder of the
transactions contemplated hereby and (ii) none of the execution and delivery of
this Agreement by such Stockholder, the consummation by such Stockholder of the
transactions contemplated hereby or


                                       3
<PAGE>   4
compliance by such Stockholder with any of the provisions hereof shall (A)
conflict with or result in any breach of any applicable organizational documents
applicable to such Stockholder, (B) result in a violation or breach of, or
constitute (with or without notice or lapse of time or both) a default (or give
rise to any third party right of termination, cancellation, material
modification or acceleration) under any of the terms, conditions or provisions
of any note, bond, mortgage, indenture, license, contract, commitment,
arrangement, understanding, agreement or other instrument or obligation of any
kind to which such Stockholder is a party or by which such Stockholder or any of
such Stockholder's properties or assets may be bound, or (C) violate any order,
writ, injunction, decree, statute, rule or regulation applicable to such
Stockholder or any of such Stockholder's properties or assets.

         (d) No Encumbrances. Except as applicable in connection with the
transactions contemplated hereby, such Stockholder's Owned Shares and the
certificates representing such Owned Shares are now, and at all times during the
term hereof will be, held of record by such Stockholder, by a nominee or
custodian for the benefit of such Stockholder or by a nominee of a commercial
bank or by a broker-dealer (for purposes of providing collateral existing on the
date hereof for lines of credit or cover for margin purposes), free and clear of
all liens, claims, security interests, proxies, voting trusts or agreements,
understandings or arrangements or any other encumbrances whatsoever, except (x)
for any such encumbrances or proxies arising hereunder in favor of Infinity and
(y) any such pledges or encumbrances existing on the date hereof in connection
with lines of credit or margin loans obtained by such Stockholder.

         (e) No Finder's Fees. No broker, investment banker, financial adviser
or other person is entitled to any broker's, finder's, financial adviser's or
other similar fee or commission in connection with the transactions contemplated
hereby based upon arrangements made by or on behalf of such Stockholder.

         (f) No Solicitation. Such Stockholder shall not, in his or its capacity
as a stockholder of OSI, directly or indirectly, solicit (including by way of
furnishing information) or respond to any inquiries or the making of any
proposal by any person or entity (other than Infinity or any affiliate of
Infinity) with respect to OSI that constitutes an Acquisition Proposal. If any
Stockholder receives any such inquiry or proposal, then such Stockholder shall
promptly inform Infinity of the existence thereof. Each Stockholder will
immediately cease and cause to be terminated any existing activities,
discussions or negotiations with any parties conducted heretofore with respect
to any of the foregoing in his or its capacity as a stockholder of OSI.

         (g) Restriction on Transfer of Shares, Proxies and Non-Interference.
Except as contemplated by this Agreement or the Merger Agreement, no Stockholder
shall, directly or indirectly, (i) offer for sale, sell, transfer, tender,
pledge, encumber, assign or otherwise dispose of, or enter into any contract,
option or other arrangement or understanding with respect to or consent to the
offer for sale, sale, transfer, tender, pledge, encumbrance, assignment or other
disposition of (any such action being referred to herein as a "Disposition"),
any or all of such Stockholder's Owned Shares or any interest therein; (ii)
except as contemplated by or permitted by this Agreement, grant any


                                       4
<PAGE>   5
proxies or powers of attorney, deposit any Owned Shares into a voting trust or
enter into a voting agreement with respect to any Owned Shares; or (iii) take
any action that would make any representation or warranty of such Stockholder
contained herein untrue or incorrect or have the effect of preventing or
disabling such Stockholder from performing such Stockholder's obligations under
this Agreement. Each Stockholder agrees with, and covenants to, Infinity that
such Stockholder shall not request that OSI register the transfer (book-entry or
otherwise) of any certificate or uncertificated interest representing any of
such Stockholder's Owned Shares, unless such transfer is permitted by and made
in compliance with this Agreement.

         (h) Rights of First Refusal. Beginning on the date hereof and ending on
the first to occur of the Effective Time and the termination of the Merger
Agreement in accordance with its terms, the Stockholders shall promptly forward
to Infinity all notices received and promptly notify Infinity of all
communications regarding their rights of first refusal contained in the M-K Link
Stockholders' Agreement.

         (i) Restriction on Transfer of Shares of Infinity Common Stock. Each
Stockholder agrees not to effect any Disposition of an aggregate number of
shares or Infinity Common Stock received by such Stockholder (x) in the Merger
or (y) following the Effective Time, upon the exercise or payment of OSI Stock
Options assumed by Infinity pursuant to the Merger Agreement (such shares are
collectively referred to as the "Restricted Shares") in excess of:

                  (i) during the first year following the Effective Time,
         Restricted Shares having a fair market value measured at the time of
         sale not to exceed $100 million in the aggregate; and

                  (ii) during the second year following the Effective Time, a
         number of Restricted Shares equal to the sum of (A) 50% of the total
         number of Restricted Shares held on the first anniversary of the
         Effective Time, plus (B) Restricted Shares having a fair market value
         not to exceed $100 million, less the aggregate fair market value
         measured at the time of sale of Restricted Shares sold pursuant to
         clause (i) of this Section 4(i).

         Notwithstanding clauses (i) and (ii) of this 4(i) and in addition to
any Dispositions in accordance with said clauses (i) and (ii):

                  (x) William S. Levine and Levine Investments Limited
         Partnership may effect Dispositions of additional Owned Shares as
         security for borrowing or margin loans from commercial lenders or
         broker-dealers up to a maximum number of Owned Shares with a fair
         market value which, when added to the then fair market value of other
         Owned Shares pledged or encumbered after the Effective Time in
         connection with similar borrowings or margin loans, will not exceed
         $125 million; and

                  (y) Arturo R. Moreno and BRN Properties Limited Partnership
         may effect Dispositions of additional Owned Shares as security for


                                       5
<PAGE>   6
         borrowings or margin loans from commercial lenders or broker-dealers up
         to a maximum number of Owned Shares with a fair market value which,
         when added to the then fair market value of other Owned Shares pledged
         or encumbered after the Effective Time in connection with similar
         borrowings or margin loans, will not exceed $100 million.

         The parties hereto agree that all restrictions on Dispositions under
this Agreement shall terminate on the third anniversary of the Effective Time.

         (j) Reliance by Infinity and Burma Acquisition. Each Stockholder
understands and acknowledges that Infinity and Burma Acquisition are entering
into the Merger Agreement in reliance upon such Stockholder's execution and
delivery of this Agreement.

         5. Representations and Warranties of Infinity. Infinity hereby
represents and warrants to each Stockholder that Infinity has the legal
capacity, power and authority to enter into and perform all of its obligations
under this Agreement. The execution, delivery and performance of this Agreement
by Infinity will not violate any other material agreement to which Infinity is a
party. In addition, the execution and delivery of this Agreement and the
consummation of the transactions contemplated hereby (i) have been duly
authorized by the board of directors of Infinity and (ii) do not and will not
violate any provision of the certificate of incorporation or by-laws of
Infinity. This Agreement has been duly and validly executed and delivered by
Infinity and constitutes a valid and binding agreement of Infinity, enforceable
against it in accordance with its terms.

         6. Further Assurances. From time to time, at the other party's request
and without further consideration, each party hereto shall execute and deliver
such additional documents and take all such further lawful action as may be
necessary or desirable to consummate and make effective, in the most expeditious
manner practicable, the transactions contemplated by this Agreement.

         7. Termination. The covenants and agreements contained herein shall
terminate (i) in the event the Merger Agreement is terminated in accordance with
its terms, upon such termination and (ii) in the event the Merger is
consummated, at the Effective Time, except that the provisions of Section 4(i)
hereof shall survive any such termination, provided, in each case, that the
provisions of Section 10 hereof shall survive any termination of this Agreement,
and provided, further, that no termination of this Agreement shall relieve any
party of liability for a breach hereof.

         8. Stockholder Capacity. No person executing this Agreement who is or
becomes during the term hereof a director or officer of OSI makes any agreement
or understanding herein in his or her capacity as such director or officer. Each
Stockholder signs solely in his or her capacity as the record or beneficial
owner of, or the trustee of a trust whose beneficiaries are the beneficial
owners of, such Stockholder's Owned Shares, and as the beneficiary of
contractual rights with respect to the M-K Link Shares.


                                       6
<PAGE>   7
         9. Sophistication. Each Stockholder acknowledges that such Stockholder
is an informed and sophisticated investor and, together with such Stockholder's
advisors, has undertaken such investigation as they have deemed necessary,
including the review of the Merger Agreement and this Agreement, to enable such
Stockholder to make an informed and intelligent decision with respect to the
Merger Agreement and this Agreement and the transactions contemplated thereby
and hereby.

         10. Confidentiality. Each of the parties hereto recognizes that
successful consummation of the transactions contemplated by this Agreement may
be dependent upon confidentiality with respect to the matters referred to
herein. In this connection, pending public disclosure thereof, each party hereby
agrees not to disclose or discuss such matters with anyone not a party to this
Agreement (other than such party's counsel and advisors, if any) without the
prior written consent of the other party, except for filings required pursuant
to the Exchange Act and the rules and regulations thereunder or disclosures such
party's counsel advises are necessary in order to fulfill such party's
obligations imposed by law, in which event such party shall give notice of such
disclosure to the other party as promptly as practicable so as to enable the
other party to seek a protective order from a court of competent jurisdiction
with respect thereto.

         11. Miscellaneous.

         (a) Entire Agreement. This Agreement and the Merger Agreement
constitute the entire agreement between the parties with respect to the subject
matter hereof and supersedes all other prior agreements and understandings, both
written and oral, between the parties with respect to the subject matter hereof.

         (b) Certain Events. Each Stockholder agrees that this Agreement and the
obligations hereunder shall attach to such Stockholder's Owned Shares and shall
be binding upon any person or entity to which legal or beneficial ownership of
such Owned Shares shall pass, whether by operation of law or otherwise,
including, without limitation, such Stockholder's heirs, guardians,
administrators or successors; provided, that following the Effective Time or
termination of the Merger Agreement, this Agreement shall not be binding on any
purchaser of Owned Shares in an open market transaction. Notwithstanding any
transfer of Owned Shares, the transferor shall remain liable for the performance
of all obligations under this Agreement of the transferor.

         (c) Assignment. This Agreement shall not be assigned by operation of
law or otherwise without the prior written consent of the other party; provided,
that Infinity may assign, in its sole discretion, its rights and obligations
hereunder to any direct or indirect wholly owned subsidiary of Infinity, but no
such assignment shall relieve Infinity of its obligations hereunder if such
assignee does not or cannot perform such obligations and, notwithstanding the
foregoing, Infinity shall remain liable for its obligations under Section 10
hereof.

         (d) Amendments, Waivers, Etc. This Agreement may not be amended,
changed, supplemented, waived or otherwise modified or terminated, with respect
to any one or more Stockholders, except upon the execution and delivery of a
written agreement


                                       7
<PAGE>   8
executed by the relevant parties hereto; provided, that Schedule I hereto may be
supplemented by Infinity by adding the name and other relevant information
concerning any stockholder of OSI who agrees to be bound by the terms of this
Agreement without the agreement of any other party hereto, and thereafter such
added stockholder shall be treated as a "Stockholder" for all purposes of this
Agreement.

         (e) Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly received if so given) by hand delivery, telegram, telex
or telecopy, or by mail (registered or certified mail, postage prepaid, return
receipt requested) or by any courier service, such as Federal Express, providing
proof of delivery. All communications hereunder shall be delivered to the
respective parties at the following addresses:

         If to a Stockholder:  At the address set forth on Schedule I hereto

         copy to:              Powell, Goldstein, Frazer & Murphy LLP,
                               Sixteenth Floor
                               191 Peachtree Street, N.E.
                               Atlanta, Georgia 30303
                               Attention:  William B. Shearer, Jr., Esq.
                               Facsimile: (404) 572-5958

         If to Infinity:       Infinity Broadcasting Corporation
                               51 West 52nd Street - 35th Floor
                               New York, New York 10019
                               Attention:  Louis J. Briskman, Esq.
                               Facsimile: (212) 597-4031

         copy to:              Weil, Gotshal & Manges LLP
                               767 Fifth Avenue
                               New York, New York 10153
                               Attention:  Howard Chatzinoff, Esq.
                               Facsimile: (212) 310-8007

or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

         (f) Severability. Whenever possible, each provision or portion of any
provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.


                                       8
<PAGE>   9
         (g) Specific Performance. Each of the parties hereto recognizes and
acknowledges that a breach by it of any covenants or agreements contained in
this Agreement will cause the aggrieved party to sustain damages for which it
would not have an adequate remedy at law for money damages, and therefore each
of the parties hereto agrees that in the event of any such breach the aggrieved
party shall be entitled to the remedy of specific performance of such covenants
and agreements and injunctive and other equitable relief in addition to any
other remedy to which it may be entitled, at law or in equity.

         (h) Remedies Cumulative. All rights, powers and remedies provided under
this Agreement or otherwise available in respect hereof at law or in equity
shall be cumulative and not alternative, and the exercise of any thereof by any
party shall not preclude the simultaneous or later exercise of any other such
right, power or remedy by such party.

         (i) No Waiver. The failure of any party hereto to exercise any right,
power or remedy provided under this Agreement or otherwise available in respect
hereof at law or in equity, or to insist upon compliance by any other party
hereto with its obligations hereunder, and any custom or practice of the parties
at variance with the terms hereof, shall not constitute a waiver by such party
of its right to exercise any such or other right, power or remedy or to demand
such compliance.

         (j) No Third Party Beneficiaries. This Agreement is not intended to be
for the benefit of, and shall not be enforceable by, any person or entity who or
which is not a party hereto.

         (k) Governing Law. This Agreement shall be governed and construed in
accordance with the laws of the State of New York, without giving effect to the
principles of conflicts of law thereof.

         (l) Jurisdiction. Each party hereby irrevocably submits to the
exclusive jurisdiction of the Court of Chancery in the State of Delaware or the
United States District Court for the Southern District of New York or any court
of the State of New York located in the City of New York in any action, suit or
proceeding arising in connection with this Agreement, and agrees that any such
action, suit or proceeding shall be brought only in such court (and waives any
objection based on forum non conveniens or any other objection to venue
therein); provided, however, that such consent to jurisdiction is solely for the
purpose referred to in this paragraph (l) and shall not be deemed to be a
general submission to the jurisdiction of said Courts or in the States of
Delaware or New York other than for such purposes. Each party hereto hereby
waives any right to a trial by jury in connection with any such action, suit or
proceeding.

         (m) Descriptive Headings. The descriptive headings used herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.


                                       9
<PAGE>   10
         (n) Counterparts. This Agreement may be executed in counterparts, each
of which shall be deemed to be an original, but all of which, taken together,
shall constitute one and the same Agreement.

                         [SIGNATURES BEGIN ON NEXT PAGE]


                                       10
<PAGE>   11
         IN WITNESS WHEREOF, Infinity and each Stockholder have caused this
Agreement to be duly executed as of the day and year first above written.

                                   INFINITY BROADCASTING CORPORATION


                                        By: /s/ Farid Suleman
                                            ____________________________________
                                            Name: Farid Suleman
                                            Title: Executive Vice President,
                                                   Chief Financial Officer
                                                   and Treasurer


                                   STOCKHOLDERS

                                   /s/ William S. Levine
                                   ________________________________________
                                   William S. Levine


                                   /s/ Arturo R. Moreno
                                   ________________________________________
                                   Arturo R. Moreno


                                   /s/ Carole D. Moreno
                                   ________________________________________
                                   Carole D. Moreno


                                   LEVINE INVESTMENTS LIMITED PARTNERSHIP
                                   By:  William S. Levine,
                                        Its Sole General Partner


                                        /s/ William S. Levine
                                        ___________________________________
                                        William S. Levine


                                   BRN PROPERTIES LIMITED PARTNERSHIP
                                   By:  Arturo R. Moreno,
                                        Its Sole General Partner


                                        /s/ Arturo R. Moreno
                                        ___________________________________
                                        Arturo R. Moreno


                                       11
<PAGE>   12
                                  SCHEDULE I TO

                             STOCKHOLDERS AGREEMENT

                                  Owned Shares

<TABLE>
<CAPTION>
                                                              Shares of
Name of Stockholder                                       OSI Common Stock
- -------------------                                       ----------------
<S>                                                       <C>
LEVINE INVESTMENTS LIMITED PARTNERSHIP                       29,733,321

WILLIAM S. LEVINE                                                   225

ARTURO R. MORENO                                              6,677,785(1)
ARTURO R. MORENO AND CAROLE MORENO, as joint tenants          3,429,396
         with rights of survivorship

BRN PROPERTIES LIMITED PARTNERSHIP                            4,121,266

                                 M-K Link Shares

M-K LINK INVESTMENTS LIMITED PARTNERSHIP                      4,348,206
</TABLE>

(1)      An additional 15,063,578 shares are subject to options exercisable by
         CEO within 60 days.


                                       12
<PAGE>   13
ADDRESS FOR STOCKHOLDERS


Mr. William S. Levine
Pacific Companies
1702 East Highland Avenue
Suite 310
Phoenix, Arizona 85016
Facsimile:  (602) 248-0884

AND

Mr. Arturo R. Moreno
Outdoor Systems, Inc.
2502 N. Black Canyon Highway
Phoenix, Arizona  85009
Facsimile:  (602) 269-8867

With a copy to:

Powell, Goldstein, Frazer & Murphy LLP
Sixteenth Floor
191 Peachtree Street, N.E.
Atlanta, Georgia  30303
Facsimile:  (404) 572-5958


                                       13

<PAGE>   1
                                                                    Exhibit 99.3

                                                                  EXECUTION COPY

                                VOTING AGREEMENT

         AGREEMENT dated May 27, 1999 among OUTDOOR SYSTEMS, INC., a Delaware
corporation ("OSI") and CBS BROADCASTING, INC., a New York corporation
("Stockholder").

                              W I T N E S S E T H:

         WHEREAS, concurrently herewith, Infinity Broadcasting Corporation, a
Delaware corporation controlled by Stockholder ("Infinity"), Burma Acquisition
Corp., a Delaware corporation and a wholly-owned subsidiary of Infinity ("Burma
Acquisition") and OSI, are entering into an Agreement and Plan of Merger (as
such agreement may hereafter be amended from time to time, the "Merger
Agreement"; capitalized terms used and not defined herein have the respective
meanings ascribed to them in the Merger Agreement), pursuant to which Burma
Acquisition will be merged with and into OSI and OSI shall continue as the
surviving corporation (the "Merger");

         WHEREAS, as an inducement and a condition to entering into the Merger
Agreement, OSI has required that Stockholder agree, and Stockholder has agreed,
to enter into this Agreement;

         NOW, THEREFORE, in consideration of the foregoing and the mutual
premises, representations, warranties, covenants and agreements contained
herein, the parties hereto, intending to be legally bound, hereby agree as
follows:

         1. Definitions. For purposes of this Agreement:

         (a) "Infinity Common Stock" shall mean at any time, collectively, the
Class A Common Stock, par value $.01 per share, and the Class B Common Stock,
par value $.01 per share, of Infinity. In the event of a stock dividend or
distribution, or any change in the Common Stock by reason of any stock dividend,
split-up, recapitalization, combination, exchange of shares or the like, the
term "Infinity Common Stock" shall be deemed to refer to and include all such
stock dividends and distributions and any shares into which or for which any or
all of the shares of Infinity Common Stock may be changed or exchanged.

         (b) "Person" shall mean an individual, corporation, partnership,
limited liability company, joint venture, association, trust, unincorporated
organization or other entity.

         (c) "Beneficially Own" or "Beneficial Ownership" with respect to any
securities shall mean having "beneficial ownership" of such securities (as
determined pursuant to Rule 13d-3 under the Securities Exchange Act of 1934, as
amended (the "Exchange Act")), including pursuant to any agreement, arrangement
or understanding, whether or not in writing. Without duplicative counting of the
same securities by the same holder, securities Beneficially Owned by a Person
shall include securities Beneficially Owned by all other Persons with whom such
Person would constitute a "group" within the meaning of Section 13(d)(3) of the
Exchange Act.
<PAGE>   2
         2. Provisions Concerning Infinity Common Stock. Stockholder hereby
agrees that during the period commencing on the date hereof and continuing until
the first to occur of the Effective Time or termination of the Merger Agreement
in accordance with its terms, at any meeting of the holders of Infinity Common
Stock, however called, or in connection with any written consent of the holders
of Infinity Common Stock, such Stockholder shall vote (or cause to be voted) all
shares of Infinity Common Stock over which such Stockholder has voting power,
whether such power exists now or is acquired by such Stockholder after the date
of this Agreement: (i) in favor of the Share Issuance and each of the other
actions contemplated by the Merger Agreement and any actions required in
furtherance thereof and hereof; (ii) against any action or agreement that would
result in a breach in any respect of any covenant, representation or warranty or
any other obligation or agreement of Infinity under the Merger Agreement or this
Agreement; and (iii) against any other action involving Infinity or its
subsidiaries which is intended, or could in any manner be expected, to
materially impede, interfere with, delay, postpone, or adversely affect the
Merger and the transactions contemplated by this Agreement and the Merger
Agreement. Stockholder shall not enter into any agreement or understanding with
any person or entity the effect of which would be inconsistent with or violative
of the provisions and agreements contained in this Section 2.

         3. Other Covenants, Representations and Warranties of Stockholder.
Stockholder hereby covenants, represents and warrants to Infinity as follows:

         (a) Ownership of Shares. Stockholder is the record holder and
beneficial owner of 700,000,000 shares of Class B Common Stock, par value $.01
per share, of Infinity (the "Subject Shares"). The Subject Shares constitute all
of the shares of Infinity Common Stock owned of record or Beneficially Owned by
Stockholder. With respect to the Subject Shares, Stockholder has sole voting
power and sole power to issue instructions with respect to the matters set forth
in Section 2 hereof, sole power of disposition and sole power to agree to all of
the other matters set forth in this Agreement, with no limitations,
qualifications or restrictions on such rights, subject to applicable securities
laws and the terms of this Agreement.

         (b) Power; Binding Agreement. Stockholder has the legal capacity,
corporate power and authority to enter into and perform all of Stockholder's
obligations under this Agreement. The execution, delivery and performance of
this Agreement by Stockholder will not violate any other agreement to which
Stockholder is a party including, without limitation, any voting agreement,
partnership agreement, stockholders agreement or voting trust. This Agreement
has been duly and validly executed and delivered by Stockholder and constitutes
a valid and binding agreement of Stockholder, enforceable against Stockholder in
accordance with its terms. There is no beneficiary or holder of a voting trust
certificate or other interest of any trust of which Stockholder is trustee whose
consent is required for the execution and delivery of this Agreement or the
consummation by Stockholder of the transactions contemplated hereby.

         (c) No Conflicts. Except for filings, permits, authorizations, consents
and approvals under federal securities laws and the HSR Act, if applicable, (i)
no filing


                                       2
<PAGE>   3
with, and no permit, authorization, consent or approval of, any state or federal
public body or authority is necessary for the execution of this Agreement by
Stockholder and the consummation by Stockholder of the transactions contemplated
hereby and (ii) none of the execution and delivery of this Agreement by
Stockholder, the consummation by Stockholder of the transactions contemplated
hereby or compliance by Stockholder with any of the provisions hereof shall (A)
conflict with or result in any breach of any organizational documents applicable
to Stockholder, (B) result in a violation or breach of, or constitute (with or
without notice or lapse of time or both) a default (or give rise to any third
party right of termination,cancellation, material modification or acceleration)
under any of the terms, conditions or provisions of any note, bond, mortgage,
indenture, license, contract, commitment, arrangement, understanding, agreement
or other instrument or obligation of any kind to which Stockholder is a party or
by which Stockholder or any of Stockholder's properties or assets may be bound,
or (C) violate any order, writ, injunction, decree, statute, rule or regulation
applicable to Stockholder or any of Stockholder's properties or assets.

         (d) No Encumbrances. Except as applicable in connection with the
transactions contemplated hereby, the Subject Shares and the certificates
representing such Subject Shares are now, and at all times during the term
hereof will be, held of record by Stockholder, or by a nominee or custodian for
the benefit of Stockholder, free and clear of all liens, claims, security
interests, proxies, voting trusts or agreements, understandings or arrangements
or any other encumbrances whatsoever, except for any such encumbrances or
proxies arising hereunder in favor of OSI.

         (e) No Finder's Fees. No broker, investment banker, financial adviser
or other person is entitled to any broker's, finder's, financial adviser's or
other similar fee or commission in connection with the transactions contemplated
hereby based upon arrangements made by or on behalf of Stockholder.

         (f) Restriction on Proxies and Non-Interference. Stockholder shall not,
directly or indirectly, (i) except as contemplated by this Agreement, grant any
proxies or powers of attorney, deposit any Subject Shares into a voting trust or
enter into a voting agreement with respect to any Subject Shares; or (ii) take
any action that would make any representation or warranty of Stockholder
contained herein untrue or incorrect or have the effect of preventing or
disabling Stockholder from performing Stockholder's obligations under this
Agreement.

         (g) Reliance by OSI. Stockholder understands and acknowledges that OSI
is entering into the Merger Agreement in reliance upon Stockholder's execution
and delivery of this Agreement.

         4. Representations and Warranties of OSI. OSI hereby represents and
warrants to Stockholder that OSI has the legal capacity, corporate power and
authority to enter into and perform all of its obligations under this Agreement.
The execution, delivery and performance of this Agreement by OSI will not
violate any other material agreement to which OSI is a party. In addition, the
execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby (i) have been


                                       3
<PAGE>   4
duly authorized by the board of directors of OSI and (ii) do not and will not
violate any provision of the certificate of incorporation or by-laws of OSI.
This Agreement has been duly and validly executed and delivered by OSI and
constitutes a valid and binding agreement of OSI, enforceable against it in
accordance with its terms.

         5. Further Assurances. From time to time, at the other party's request
and without further consideration, each party hereto shall execute and deliver
such additional documents and take all such further lawful action as may be
necessary or desirable to consummate and make effective, in the most expeditious
manner practicable, the transactions contemplated by this Agreement.

         6. Termination. The covenants and agreements contained herein with
respect to the Subject Shares shall terminate (i) in the event the Merger
Agreement is terminated in accordance with its terms, upon such termination and
(ii) in the event the Merger is consummated, at the Effective Time, provided, in
each case, that the provisions of Section 7 hereof shall survive any termination
of this Agreement, and provided, further, that no termination of this Agreement
shall relieve any party of liability for a breach hereof.

         7. Confidentiality. Each of the parties hereto recognizes that
successful consummation of the transactions contemplated by this Agreement may
be dependent upon confidentiality with respect to the matters referred to
herein. In this connection, pending public disclosure thereof, each party hereby
agrees not to disclose or discuss such matters with anyone not a party to this
Agreement (other than such party's counsel and advisors, if any) without the
prior written consent of the other party, except for filings required pursuant
to the Exchange Act and the rules and regulations thereunder or disclosures such
party's counsel advises are necessary in order to fulfill such party's
obligations imposed by law, in which event such party shall give notice of such
disclosure to the other party as promptly as practicable so as to enable the
other party to seek a protective order from a court of competent jurisdiction
with respect thereto.

         8. Miscellaneous.

         (a) Entire Agreement. This Agreement and the Merger Agreement
constitute the entire agreement between the parties with respect to the subject
matter hereof and supersedes all other prior agreements and understandings, both
written and oral, between the parties with respect to the subject matter hereof.

         (b) Certain Events. Stockholder agrees that this Agreement and the
obligations hereunder shall attach to the Subject Shares and shall be binding
upon any person or entity to which legal or Beneficial Ownership of the Subject
Shares shall pass, whether by operation of law or otherwise, including, without
limitation, Stockholder's successors. Notwithstanding any transfer of Subject
Shares, the transferor shall remain liable for the performance of all
obligations under this Agreement of the transferor. Prior to any transfer of
Subject Shares, Stockholder shall give the transferee written notice of the
foregoing obligations and the terms of this Section 8(b).


                                       4
<PAGE>   5
         (c) Assignment. This Agreement shall not be assigned by operation of
law or otherwise by either party hereto without the prior written consent of the
other party.

         (d) Amendments, Waivers, Etc. This Agreement may be amended, changed,
supplemented, waived or otherwise modified or terminated, upon the execution and
delivery of a written agreement executed by the relevant parties hereto.

         (e) Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly received if so given) by hand delivery, telegram, telex
or telecopy, or by mail (registered or certified mail, postage prepaid, return
receipt requested) or by any courier service, such as Federal Express, providing
proof of delivery. All communications hereunder shall be delivered to the
respective parties at the following addresses:

         If to Stockholder:      CBS Corporation
                                 51 West 52nd Street - 35th Floor
                                 New York, New York 10019
                                 Attention: Louis J. Briskman, Esq.
                                 Facsimile: (212) 597-4031

         copy to:                Weil, Gotshal & Manges LLP
                                 767 Fifth Avenue
                                 New York, New York  10153
                                 Attention: Howard Chatzinoff, Esq.
                                 Facsimile: (212) 310-8007

         If to OSI:              Outdoor Systems, Inc.
                                 2502 North Black Canyon Highway
                                 Phoenix, Arizona 85009
                                 Attention: William Levine
                                 Facsimile: (602) 248-0884

         copy to:                Powell, Goldstein, Frazer & Murphy LLP
                                 Sixteenth Floor
                                 191 Peachtree Street, N.E.
                                 Atlanta, Georgia  30303
                                 Attention: William B. Shearer, Jr., Esq.
                                 Facsimile: (404) 572-5958

or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

         (f) Severability. Whenever possible, each provision or portion of any
provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any


                                       5
<PAGE>   6
applicable law or rule in any jurisdiction, such invalidity, illegality or
unenforceability will not affect any other provision or portion of any provision
in such jurisdiction, and this Agreement will be reformed, construed and
enforced in such jurisdiction as if such invalid, illegal or unenforceable
provision or portion of any provision had never been contained herein.

         (g) Specific Performance. Each of the parties hereto recognizes and
acknowledges that a breach by it of any covenants or agreements contained in
this Agreement will cause the aggrieved party to sustain damages for which it
would not have an adequate remedy at law for money damages, and therefore each
of the parties hereto agrees that in the event of any such breach the aggrieved
party shall be entitled to the remedy of specific performance of such covenants
and agreements and injunctive and other equitable relief in addition to any
other remedy to which it may be entitled, at law or in equity.

         (h) Remedies Cumulative. All rights, powers and remedies provided under
this Agreement or otherwise available in respect hereof at law or in equity
shall be cumulative and not alternative, and the exercise of any thereof by any
party shall not preclude the simultaneous or later exercise of any other such
right, power or remedy by such party.

         (i) No Waiver. The failure of any party hereto to exercise any right,
power or remedy provided under this Agreement or otherwise available in respect
hereof at law or in equity, or to insist upon compliance by any other party
hereto with its obligations hereunder, and any custom or practice of the parties
at variance with the terms hereof, shall not constitute a waiver by such party
of its right to exercise any such or other right, power or remedy or to demand
such compliance.

         (j) No Third Party Beneficiaries. This Agreement is not intended to be
for the benefit of, and shall not be enforceable by, any person or entity who or
which is not a party hereto.

         (k) Governing Law. This Agreement shall be governed and construed in
accordance with the laws of the State of New York, without giving effect to the
principles of conflicts of law thereof.

         (l) Jurisdiction. Each party hereby irrevocably submits to the
exclusive jurisdiction of the Court of Chancery in the State of Delaware or the
United States District Court for the Southern District of New York or any court
of the State of New York located in the City of New York in any action, suit or
proceeding arising in connection with this Agreement, and agrees that any such
action, suit or proceeding shall be brought only in such court (and waives any
objection based on forum non conveniens or any other objection to venue
therein); provided, however, that such consent to jurisdiction is solely for the
purpose referred to in this paragraph (l) and shall not be deemed to be a
general submission to the jurisdiction of said Courts or in the States of
Delaware or New York other than for such purposes. Each party hereto hereby
waives any right to a trial by jury in connection with any such action, suit or
proceeding.



                                       6
<PAGE>   7
         (m) Descriptive Headings. The descriptive headings used herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.

         (n) Counterparts. This Agreement may be executed in counterparts, each
of which shall be deemed to be an original, but all of which, taken together,
shall constitute one and the same Agreement.

                         [SIGNATURES BEGIN ON NEXT PAGE]


                                       7
<PAGE>   8
         IN WITNESS WHEREOF, OSI and Stockholder have caused this Agreement to
be duly executed as of the day and year first above written.

                                    OUTDOOR SYSTEMS, INC.


                                    By: /s/ William S. Levine
                                        -------------------------------------
                                        Name:  William S. Levine
                                        Title: Chairman of the Board


                                    CBS BROADCASTING, INC.


                                    By: /s/ Louis J. Briskman
                                        -------------------------------------
                                        Name:  Louis J. Briskman
                                        Title: Executive Vice President
                                               and General Counsel


                                       8

<PAGE>   1
                                                                    Exhibit 99.4

                                                                  EXECUTION COPY


                          REGISTRATION RIGHTS AGREEMENT

         REGISTRATION RIGHTS AGREEMENT, dated as of ______ __, 1999 (this
"Agreement"), among INFINITY BROADCASTING CORPORATION, a Delaware corporation
("Infinity"), and the holders signatory hereto (the "Stockholders") of Class A
common stock, par value $.01 per share, of Infinity (the "Infinity Common
Stock").

                              W I T N E S S E T H :

         WHEREAS, in connection with and pursuant to Section 5.17 of the
Agreement and Plan of Merger, dated as of May 27, 1999 (the "Merger Agreement"),
by and among Infinity, Burma Acquisition Corp., a Delaware corporation ("Merger
Sub"), and Outdoor Systems, Inc., a Delaware corporation ("OSI"), Infinity
agreed to enter into this Agreement for the benefit of the Stockholders;

         WHEREAS, pursuant to the Merger (as defined in the Merger Agreement),
Merger Sub was merged with and into OSI, with OSI surviving the Merger as a
wholly owned subsidiary of Infinity, and each share of the common stock, par
value $.0l per share, of OSI (the "OSI Common Stock") outstanding immediately
prior to the Merger was automatically converted pursuant to the Merger into
Infinity Common Stock based on the Exchange Ratio;

         WHEREAS, pursuant to the Merger Agreement, Infinity has agreed to grant
to the Stockholders certain registration rights with respect to shares of
Infinity Common Stock issued to the Stockholders in the Merger that constitute
Registrable Securities (as hereinafter defined), as well as certain other
securities to which the Stockholders may be entitled as provided below, upon the
terms and subject to the conditions set forth herein; and

         WHEREAS, it is intended by Infinity that this Agreement shall become
effective immediately;

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants contained herein, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, Infinity, intending to
be legally bound hereby, hereby agrees as follows:

         Section 1. Definitions. Capitalized terms used but not defined in this
Agreement shall have the meanings assigned to such terms in the Merger
Agreement.

         Section 2. Registration Rights.

         (a) Registration Upon Request.

                  (i) At any time. and from time to time, commencing with the
later of the Effective Time and January 1, 2000 and ending on December 31, 2004
(the "Effective Period"), upon the written request (a "demand") of any Qualified
Holder(s) (as
<PAGE>   2
hereinafter defined) requesting that Infinity effect the registration for sale
under the Securities Act of 1933, as amended (the "Securities Act"), of
Registrable Securities held by such holders, Infinity promptly shall use its
best efforts to register under the Securities Act (a "Demand Registration") the
Registrable Securities which Infinity has been requested to register, all to the
extent necessary to permit the disposition of such Registrable Securities in
accordance with the methods intended by the sellers thereof; provided that (i)
such demand shall cover at least U.S. $[ ] in Infinity Common Stock based on the
closing price for Infinity Common Stock on the NYSE Composite Tape for the last
trading day immediately preceding the date of the demand, (ii) the Qualified
Holder(s) shall not be permitted to make a demand within 60 days following the
effective date of any registration statement for equity securities of Infinity
(other than on Form S-4 or Form S-8 or any successor or equivalent form) and
(iii) Infinity shall not be required to effect more than one Demand Registration
for the Stockholders pursuant to this Section 2(a). An exercise of the Demand
Registration right will not count as the use of such right unless the
registration statement to which it relates is declared effective under the
Securities Act. However, an exercise of the Demand Registration right will count
as the use of such right even though the registration statement to which it
relates is declared effective if such effective registration statement is
interfered with by any stop order, injunction or other order or requirement of
the Securities and Exchange Commission (the "Commission") or of another
governmental agency or court due to a material misrepresentation in or material
omission from information provided in writing by such Qualified Holder expressly
for inclusion by such Qualified Holder in such registration statement.

                  (ii) As used in this Agreement, the term "Registrable
Securities" means any and all (A) Infinity Common Stock acquired by the
Qualified Holders pursuant to the Merger, upon conversion of any other
securities acquired by the Qualified Holders pursuant to the Merger or upon the
exercise of stock options assumed by Infinity pursuant to the Merger Agreement
and (B) any other securities issued or issuable with respect to any shares of
Infinity Common Stock described in clause (A) of this paragraph by way of a
stock dividend or stock split or in connection with a combination, exchange,
reorganization, recapitalization or reclassification of any securities of
Infinity, or pursuant to a merger, consolidation or other similar business
combination transaction involving Infinity.

                  (iii) As to any particular Registrable Securities, such
securities shall cease to constitute Registrable Securities when (A) a
registration statement with respect to the sale of such securities shall have
been declared effective under the Securities Act and such securities shall have
been disposed of in accordance with the plan of distribution contemplated by the
registration statement, (B) such securities shall have been sold in satisfaction
of all applicable conditions to the resale provisions of Rule 144 under the
Securities Act (or any successor provision thereto), (C) such securities shall
have been transferred, sold or disposed of by a Qualified Holder to any person
that is not a Qualified Holder or (iv) such securities shall have ceased to be
issued and outstanding.


                                       2
<PAGE>   3
                  (iv) (A) The term "Qualified Holder(s)" means any holder of
Registrable Securities and any transferee of any such holder who or which has
agreed in writing to be bound by the terms of this Agreement and (i) has
succeeded to the interest of such Shareholder by gift or by virtue of the laws
of descent and distribution, (ii) is a corporation, limited liability company,
partnership, or other entity controlled by such holder and his spouse, children
or grandchildren or (iii) a trust of which such holder is a trustee or which is
established for the benefit of such holder or such holder's spouse, children or
grandchildren.

                           (B) The term "Majority Qualified Holder(s)" means a
majority in interest of the Qualified Holders participating in a registration of
Registrable Securities pursuant hereto.

                  (v) Infinity shall be required to register Infinity Common
Stock pursuant to Section 2(a) only if such Infinity Common Stock is to be
offered and sold in an underwritten distribution registered under the Securities
Act.

                  (vi) It is hereby further agreed that with respect to any
Demand Registration requested pursuant to this Section 2(a), Infinity may defer
the filing or effectiveness of the registration statement for a period of up to
(A) 45 days if Infinity is, at such time, working on an underwritten public
offering of Infinity Common Stock and is advised by its Managing Underwriter(s)
that such offering would in such Managing Underwriter(s) opinion be adversely
affected in any material respect by such filing (provided that if Infinity files
a registration statement with respect to such an offering during such 45-day
period, Infinity may defer the filing or effectiveness of the requested Demand
Registration until the expiration of the 60-day period referred to in Section
2(a)(i) hereof) or (B) 90 days if the chief executive officer or general counsel
of Infinity, in his or her good faith judgment, determines and advises the
requesting Qualified Holder(s) that any such filing or the offering of any
Registrable Securities would impair or interfere in any material respect with
any proposed material financing, other offer or sale of securities, acquisition,
corporate reorganization or other significant transaction involving Infinity, or
would require Infinity to make public disclosure of information which could have
a material adverse effect on Infinity; provided, however, that Infinity may not
utilize the right set forth in clause (B) more than once in any 12-month period.

                  (vii) Infinity shall have the right to cause the registration
of additional securities for sale for the account of any person (including
Infinity) in the registration of Registrable Securities requested by the
Qualified Holder(s) pursuant to Section 2(a); provided, that Infinity shall not
have the right to cause the registration of such additional securities to the
extent the Qualified Holder(s) is advised in writing (with a copy to Infinity)
by the Managing Underwriter(s) for such Demand Registration that, in such firm's
opinion, registration of such additional securities would impair or interfere in
any material respect with the marketing and sale of the Registrable Securities
proposed to be registered in the offering by the Qualified Holder(s), and in no
event shall any Qualified Holder be obligated to reduce the number of
Registrable Securities to be included in any offering in order to accommodate
the addition of any other person (including Infinity).


                                       3
<PAGE>   4
The Qualified Holder(s) may require that any such additional securities be
included in the offering proposed by the Qualified Holder(s) on the same terms
and conditions as the Registrable Securities that are included therein.

         (b) Incidental Registrations.

                  (i) If at any time or from time to time Infinity shall
determine to register any of its securities, either for its own account or the
account of security holders, other than a registration relating solely to
employee benefit plans or a registration on Form S-4 relating solely to an SEC
Rule 145 transaction, Infinity will:

                           (A) promptly give the Qualified Holders written
notice thereof (which shall include a list of the jurisdictions in which
Infinity intends to attempt to qualify such securities under the applicable
"blue sky" or other state securities laws); and

                           (B) include in such registration (and any related
qualification under "blue sky" laws or other compliance), and in any
underwriting involved therein, all the Registrable Securities specified in a
written request, made by the Qualified Holders within thirty (30) days after
receipt of such written notice from Infinity, except as set forth in Section
2(b)(ii) below.

                  (ii) If the registration of which Infinity gives notice is for
a registered public offering involving an underwriting, Infinity shall so advise
the Qualified Holders as a part of the written notice given pursuant to Section
2(b)(i). In such event the right of the Qualified Holders to registration
pursuant to this Section 2 shall be conditioned upon the Qualified Holders'
participation in such underwriting and the inclusion of the Qualified Holders'
Registrable Securities in the underwriting to the extent provided herein. The
Qualified Holders, together with Infinity and the other parties distributing
their securities through such underwriting, shall enter into an underwriting
agreement in customary form with the underwriter or underwriters selected for
such underwriting by the Company. Notwithstanding any other provision of this
Section 2, if the Managing Underwriters determine that marketing factors require
a limitation of the number of shares or type of securities to be underwritten,
the Managing Underwriters may limit the number of Registrable Securities to be
included in the registration and underwriting, or may exclude Registrable
Securities entirely from such registration and underwriting subject to the terms
of this Section. Infinity shall so advise by writing all holders of Infinity's
securities that would otherwise have a right to be so registered and
underwritten and the number of shares of such securities, including Registrable
Securities, that may be included in the registration and underwriting shall be
allocated (A) first, to Infinity (if Infinity is registering securities for its
own account) and (B) thereafter, among all such other holders in proportion, as
nearly as practicable, to the respective amounts of securities of Infinity
proposed to be included in such underwritten offering by all shareholders;
provided, however, that the rights of the Qualified Holders to include all or
any allocable portion of such Registrable Securities shall be subject to the
priority (prior to any allocation to the Qualified Holders) of the holders of
existing "demand" registration rights similar to that provided in Section 2(a)
hereof existing on the date


                                       4
<PAGE>   5
hereof (all such existing rights are included in agreements referred to in
Section 12 hereof) and shall have priority over holders of demand registration
rights that may be granted in the future (prior to any allocation to such other
holders). No securities excluded from the underwriting by reason of the Managing
Underwriters' marketing limitation shall be included in such registration. If
the Qualified Holders disapprove of the terms of the underwriting, they may
elect to withdraw therefrom by written notice to Infinity and the underwriter.
The Registrable Securities so withdrawn shall also be withdrawn from
registration.

         Each Qualified Holder agrees that any shares of Registrable Securities
which are not included in an underwritten public offering described in Section
2(b) in which such Qualified Holder participates shall not be publicly sold by
the Qualified Holders for a period, not to exceed one hundred twenty (120) days,
which the Managing Underwriter reasonably determines is necessary in order to
effect such underwritten public offering.

         (c) Registration Procedures. If and whenever Infinity is required by
the provisions of this Agreement to effect or cause the registration of any
Registrable Securities under the Securities Act as provided in this Agreement,
Infinity shall use its best efforts to:

                  (i) prepare and file with the Commission, as soon as
practicable following the receipt of the demand (subject to the limitation
contained in the provisio below) a registration statement on a form which is
available for the sale of Registrable Securities by the holders thereof in
accordance with the intended plan of distribution therefor (subject to Section
2(a)(v)), and is reasonably acceptable to the Majority Qualified Holders of
Registrable Securities participating therein, and use its best efforts to cause
such registration statement to become and remain effective under the Securities
Act for not less than a period of 60 days (unless the Registrable Securities
registered thereunder have been sold or disposed of prior to the expiration of
such 60-day period); provided, however, that with respect to any demand for
registration pursuant to Section 2(a) made within the period commencing 30 days
next preceding the end of Infinity's fiscal year and ending 90 days after the
end of Infinity's fiscal year only, if Infinity is not then eligible to effect a
registration under the Securities Act by use of Form S-3 (or other comparable
short-form registration statement), Infinity shall be entitled to delay the
effectiveness of such registration until ten days after the earlier of (x) such
time as Infinity receives audited financial statements for such fiscal year and
(y) the expiration of 90 days after the last day of such fiscal year;

                  (ii) prepare and file with the Commission such amendments,
post-effective amendments and supplements to such registration statement and the
prospectus used in connection therewith as may be necessary to keep such
registration statement effective for such period of time as is necessary to
complete the offering and the distribution of the securities covered thereby
(but, in no event, longer than 60 days after such registration statement becomes
effective) in each case exclusive of any period during which the prospectus used
in connection with such registration statement shall not comply with the
requirements of Section 10 of the Securities Act; and to comply with the


                                       5
<PAGE>   6
provisions of the Securities Act with respect to the disposition of all
securities covered by such registration statement during said 60-day period;

                  (iii) furnish to each seller of Registrable Securities and
each underwriter of the securities being sold by such seller, (A) such number of
copies of such registration statement and of each such amendment thereof and
supplement thereto (including all annexes, appendices, schedules and exhibits),
(B) such number of copies of the prospectus used in connection with such
registration statement (including each preliminary prospectus and any summary
prospectus and the final prospectus filed pursuant to Rule 424(b) under the
Securities Act) and (C) such number of copies of other documents, as such seller
and underwriter may reasonably request in order to facilitate the disposition of
Registrable Securities in accordance with the methods intended by the sellers
thereof and, in each of the foregoing cases, afford the seller a reasonable
opportunity to review and comment on drafts of each of the foregoing documents
prior to their filing or distribution, as the case may be;

                  (iv) register or qualify the Registrable Securities covered by
such registration statement under the securities or "blue sky" laws of such
jurisdictions as any seller and each underwriter of the Registrable Securities
shall reasonably request, and do any and all other acts and things which may be
necessary or desirable to enable such seller and underwriter to consummate the
offering and disposition of Registrable Securities in such jurisdictions;
provided, however, Infinity shall not be required to qualify generally to do
business as a foreign corporation, subject itself to taxation, or consent to
general service of process, in any jurisdiction wherein it would not, but for
the requirements of this Section 2(c), be obligated to be qualified;

                  (v) cause the Registrable Securities covered by such
registration statement to be registered with, or approved by, such other public,
governmental or regulatory authorities as may be necessary to facilitate the
disposition of such Registrable Securities in accordance with the methods of
disposition intended by the sellers thereof;

                  (vi) notify each seller of any Registrable Securities covered
by such registration statement and the Managing Underwriter(s), if any, promptly
and, if requested by any such person, confirm such notification in writing, (A)
when a prospectus or any prospectus supplement has been filed with the
Commission, and, with respect to a registration statement or any post-effective
amendment thereto, when the same has been declared effective by the Commission,
(B) of any request by the Commission for amendments or supplements to a
registration statement or related prospectus, or for additional information, (C)
of the issuance by the Commission of any stop order or the initiation of any
proceedings for such or a similar purpose (and Infinity shall make every
reasonable effort to obtain the withdrawal of any such order at the earliest
practicable moment), (D) of the receipt by Infinity of any notification with
respect to the suspension of the qualification of any of the Registrable
Securities for sale in any jurisdiction or the initiation or threatening of any
proceeding for such purpose (and Infinity shall make every reasonable effort to
obtain the withdrawal of any such suspension at the earliest practicable
moment), (E) of the occurrence of any event which


                                       6
<PAGE>   7
requires the making of any changes to a registration statement or related
prospectus so that such documents will not contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading (and Infinity shall as promptly as
practicable prepare and furnish to such seller and the Managing Underwriter(s) a
reasonable number of copies of a supplemented or amended prospectus such that,
as thereafter delivered to the purchasers of such Registrable Securities, such
prospectus shall not include an untrue statement of a material fact or omit to
state a material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they are made, not
misleading), and (F) of Infinity's determination that the filing of a
post-effective amendment to the Registration Statement shall be necessary or
appropriate. Each holder of Registrable Securities agrees that such holder will,
as expeditiously as possible, notify Infinity at any time when a prospectus
relating to a registration statement covering such seller's Registrable
Securities is required to be delivered under the Securities Act, of the
happening of any event of the kind described in this Section 2(c)(vi) as a
result of any information provided by such seller in writing specifically for
inclusion in such prospectus included in such registration statement and, at the
request of Infinity, promptly prepare and furnish to it such information as may
be necessary so that, after incorporation into a supplement or amendment of such
prospectus as thereafter delivered to the purchasers of such securities, the
information provided by such seller shall not include an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements made therein, in the light of the circumstances
under which they were made, not misleading. Each holder of Registrable
Securities shall be deemed to have agreed by acquisition of such Registrable
Securities that upon the receipt of any notice from Infinity of the occurrence
of any event of the kind described in clause (E) of this Section 2(c)(vi), such
holder shall forthwith discontinue such holder's offer and disposition of
Registrable Securities pursuant to the registration statement covering such
Registrable Securities until such holder shall have received copies of a
supplemented or amended prospectus which is no longer defective as contemplated
by clause (E) of this Section 2(c)(vi) and, if so directed by Infinity, shall
deliver to Infinity, at Infinity's expense, all copies (other than permanent
file copies) of the defective prospectus covering such Registrable Securities
which are then in such holder's possession. In the event Infinity shall provide
any notice of the type referred to in the preceding sentence, the 60- day period
mentioned in Sections 2(c)(i) and 2(c)(ii) shall be extended by the number of
days from and including the date such notice is provided, to and including the
date when each seller of any Registrable Securities covered by such registration
statement shall have received copies of the corrected prospectus contemplated by
clause (E) of this Section 2(c)(vi);

                  (vii) use its reasonable best efforts to comply with all
applicable rules and regulations of the Commission, as the same may hereafter be
amended, and make available to its security holders, as soon as reasonably
practicable, an earnings statement, which shall satisfy the provisions of
Section 11(a) of the Securities Act;


                                       7
<PAGE>   8
                  (viii) cause all such Registrable Securities covered by such
registration statement to be listed on each securities exchange on which similar
securities issued by Infinity are then listed, if the listing of such
Registrable Securities is then permitted under the rule and regulations of such
exchange;

                  (ix) engage and provide a transfer agent (which may be an
existing transfer agent) for all Registrable Securities covered by such
registration statement no later than the effective date of such registration
statement;

                  (x) enter into one or more underwriting agreements (in
customary form and substance) and take all such other actions (including,
without limitation, to the extent reasonably consistent with work commitments
but without diminishment of Infinity's obligations hereunder, and upon
reasonable notice, participation in a reasonable number of "roadshow"
presentations) as the participating holders shall reasonably request in order to
expedite or facilitate the disposition of such Registrable Securities in
accordance with the plan of distribution intended by the sellers thereof; it
being hereby acknowledged and agreed that in all cases the selection of any
Managing Underwriter(s) shall be made by Infinity with the consent of the
Majority Qualified Holders (which consent may not be unreasonably withheld or
delayed); and

                  (xi) obtain an opinion from counsel to Infinity, and a "cold
comfort" letter from an independent certified public accounting firm of national
recognition and standing who have certified Infinity's financial statements
included in the registration statement or any amendment thereto, in each case in
form and substance reasonably satisfactory to the Majority Qualified Holders,
and covering such matters of the type customarily covered by such opinions and
"cold comfort" letters as the Majority Qualified Holders shall reasonably
request.

         (d) Custody Agreement and Power of Attorney. Upon Infinity's request,
the Qualified Holder(s) will execute and deliver a custody agreement and power
of attorney in form and substance reasonably satisfactory to Infinity with
respect to the Registrable Securities to be registered pursuant to this Section
2 (a "Custody Agreement and Power of Attorney"). The Custody Agreement and Power
of Attorney will provide, among other things, that the Qualified Holders will
deliver to and deposit in custody with the custodian and attorney-in-fact named
therein a certificate or certificates representing such shares of Registrable
Securities (duly endorsed in blank by the registered owner or owners thereof or
accompanied by duly executed stock powers in blank) and irrevocably appoint said
custodian and attorney-in-fact as the Qualified Holder's agent and
attorney-in-fact with full power and authority to act under the Custody
Agreement and Power of Attorney on behalf of the Qualified Holders with respect
to the matters specified therein.

         (e) Registration Expenses. Whether or not any registration statement
prepared and filed pursuant to this Section 2 is declared effective by the
Commission, Infinity shall pay (A) all Commission and NYSE registration and
filing fees and expenses; (B) all listing, transfer and/or exchange agent and
registrar fees; (C) fees and expenses in connection with the qualification of
the Registrable Securities under securities or "blue


                                       8
<PAGE>   9
sky" laws including reasonable fees, disbursements and related charges of
counsel for the underwriters in connection therewith; (D) printing expenses; (E)
messenger and delivery expenses; (F) fees and out-of-pocket expenses of counsel
for Infinity and its independent certified public accountants (including the
expenses of any audit, review and/or "cold comfort" letters) and other persons,
including special experts, retained by Infinity; (G) the reasonable fees and
disbursements of counsel, other than Infinity's counsel, selected by the
Majority Qualified Holders of the Registrable Securities being registered to
represent all Qualified Holders of the Registrable Securities being registered
in connection with each such registration (it being understood that any
Qualified Holder may, at its own expense, retain separate counsel to represent
it in connection with such registration); and (H) any other costs and expenses
of such registration and the disposition of the securities pursuant to the
registration statement therefor (collectively, clauses (A) through (H),
"Registration Expenses"); provided, however, that Infinity shall not be required
to pay, and the Qualified Holders shall pay, all transfer taxes and all
discounts, commissions or fees of underwriters, selling brokers and dealers.

         (f) Indemnification; Contribution.

                  (i) Infinity shall indemnify and hold harmless, to the fullest
extent permitted by law, each holder (a "Participating Holder") of Registrable
Securities registered pursuant to Section 2(a) or Section 2(b) hereof, its
officers and directors, if any, and each person, if any, who controls such
holder within the meaning of Section 15 of the Securities Act or Section 20 of
the Exchange Act, from and against all losses, claims, damages, liabilities (or
proceedings in respect thereof) and expenses (including the reasonable costs of
investigation and reasonable attorneys' fees, disbursements and related charges)
(under the Securities Act, common law and otherwise) (collectively, "Claims"),
joint or several, which arise out of or are based upon (A) any untrue statement
or alleged untrue statement of a material fact contained in any registration
statement, prospectus, preliminary prospectus, any amendment or supplement
thereto or any document incorporated by reference or in any filing made in
connection with the registration or qualification of the offering under "blue
sky" or other securities laws of jurisdictions in which the Participating
Holder's Registrable Securities are offered (collectively, "Security Filings"),
or any omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein not misleading,
and (B) any untrue statement or alleged untrue statement of a material fact
contained in any preliminary prospectus, if used prior to the effective date of
such registration statement (unless such statement is corrected in the final
prospectus and Infinity has previously furnished copies thereof to any
Participating Holder seeking such indemnification and to the underwriters of the
registration in question), or contained in the final prospectus (as amended or
supplemented if Infinity shall have filed with the Commission any amendment
thereof or supplement thereto) if used within the period during which Infinity
is required to keep the registration statement to which such prospectus relates
current, or the omission or alleged omission to state therein a material fact
necessary in order to make the statements therein, in light of the circumstances
under which they were made, not misleading; and Infinity shall, and it hereby
agrees to,


                                       9
<PAGE>   10
reimburse such holders for any legal or other expenses reasonably incurred by
them in connection with investigating or defending any such claim or proceeding;
provided, however, that such indemnification shall not extend to any Claims
which are caused by any untrue statement or alleged untrue statement contained
in, or by any omission or alleged omission from, information furnished in
writing to Infinity by any Qualified Holder expressly for use in any such
Security Filing.

                  (ii) In the case of an underwritten offering in which the
registration statement covers Registrable Securities, Infinity agrees to enter
into an underwriting agreement in customary form and substance with such
underwriters and to indemnify the underwriters, their officers and directors, if
any, and each person, if any, who controls such underwriter within the meaning
of Section 15 of the Securities Act or Section 20 of the Exchange Act, to the
same extent as provided in the preceding paragraph with respect to the
indemnification of the holders of Registrable Securities; provided, however,
Infinity shall not be required to indemnify any such underwriter, or any officer
or director of such underwriter or any person who controls such underwriter
within the meaning of Section 15 of the Securities Act or Section 20 of the
Exchange Act, to the extent that the loss, claim, damage, liability (or
proceedings in respect thereof) or expense for which indemnification is sought
results from (i) such underwriter's failure to deliver or otherwise provide a
copy of the final prospectus to the person asserting an untrue statement or
omission or alleged untrue statement or omission at or prior to the written
confirmation of the sale of securities to such person, if such statement or
omission was in fact corrected in such final prospectus or (ii) an untrue
statement or omission or alleged untrue statement or omission relating to
information furnished in writing by such underwriter expressly for inclusion in
any Security Filing.

                  (iii) Each Participating Holder shall furnish to Infinity in
writing such information regarding such holder and the intended method of
distribution as shall be reasonably requested by Infinity and as required by law
or the Commission for use in any Security Filing (and Infinity may exclude from
registration the Registrable Securities of any such Participating Holder if such
holder fails to furnish such information within a reasonable time alter
receiving such request) and hereby severally indemnifies, to the fullest extent
permitted by law, Infinity, its officers and directors and each person, if any,
who controls Infinity within the meaning of Section 15 of the Securities Act or
Section 20 of the Exchange Act, against any Claims resulting from any untrue
statement or alleged untrue statement of a material fact or any omission or
alleged omission of a material fact required to be stated or necessary to make
the statements in the registration statement or prospectus, or any amendment
thereof or supplement thereto (in the case of any prospectus or supplement
thereto, in light of the circumstances under which they were made) not
misleading; provided, however, (A) each such Participating Holder shall be
liable hereunder if and only to the extent that any such Claim arises out of or
is based upon any such untrue statement or omission made in reliance upon and in
conformity with information pertaining to such holder that is furnished in
writing to Infinity by such holder expressly for use in any such Security Filing
and (B) no such Participating Holder shall be liable hereunder in an amount
exceeding the net proceeds to be received by such


                                       10
<PAGE>   11
Participating Holder (before deducting expenses) from the sale of Registrable
Securities hereunder.

                  (iv) In the case of an underwritten offering of Registrable
Securities, each Participating Holder, as a condition to its right to
participate in such offering, shall enter into an underwriting agreement in
customary form and substance with such underwriters, and agree to indemnify such
underwriters, their officers and directors, if any, and each person, if any, who
controls such underwriters within the meaning of Section 15 of the Securities
Act or Section 20 of the Exchange Act, to the same extent and subject to the
same limitations as provided in the preceding paragraph with respect to
indemnification by such holder to Infinity, but subject to the same limitation
as provided in Section 2(f)(ii) with respect to indemnification by Infinity of
such underwriters, officers, directors and control persons; provided, however,
that no such Participating Holder shall be liable hereunder in an amount
exceeding the net proceeds to be received by such Participating Holder (before
deducting expenses) from the sale of Registrable Securities hereunder.

                  (v) Any person seeking indemnification under the provisions of
this Section 2(f) shall, promptly after receipt by such person of notice of the
commencement of any action, suit, claim or proceeding, notify each party against
whom indemnification is to be sought in writing of the commencement thereof;
provided, however, the failure so to notify an indemnifying party shall not
relieve the indemnifying party from any liability which it may have under this
Section 2(f) (except to the extent that it has been materially prejudiced by
such failure) or from any liability which the indemnifying party may otherwise
have. In case any such action, suit, claim or proceeding is brought against any
indemnified party, and it notifies an indemnifying party of the commencement
thereof, the indemnifying party shall be entitled to participate therein and, to
the extent it may elect by written notice delivered to the indemnified party
promptly after receiving the aforesaid notice from such indemnified party, to
assume the defense thereof with counsel reasonably satisfactory to such
indemnified party. Notwithstanding the foregoing, the indemnified party shall
have the right to employ its own counsel in any such case, but the fees and
expenses of such counsel shall be at the expense of such indemnified party
unless (A) the employment of such counsel shall have been authorized in writing
by the indemnifying party in connection with the defense of such suit, action,
claim or proceeding, (B) the indemnifying party shall not have employed counsel
(reasonably satisfactory to the indemnified party) to take charge of the defense
of such action, suit, claim or proceeding within a reasonable time after notice
of commencement of the action, suit, claim or proceeding, or (C) such
indemnified party shall have reasonably concluded that there may be defenses
available to it which are different from or additional to those available to the
indemnifying party which, if the indemnifying party and the indemnified party
were to be represented by the same counsel, could result in a conflict of
interest for such counsel or materially prejudice the prosecution of the
defenses available to such indemnified party. If any of the events specified in
clauses (B) or (C) of the preceding sentence shall have occurred or shall
otherwise be applicable, then the reasonable fees, disbursements and related
charges of one counsel or firm of counsel selected by a


                                       11
<PAGE>   12
majority in interest of the indemnified parties shall be borne by the
indemnifying party. The indemnifying party shall have the right to direct the
defense of such action, suit, claim or proceeding on behalf of the indemnified
party whether or not the indemnified party employs separate counsel, unless the
indemnifying party has failed to perform his or its indemnification obligations
hereunder. Anything in this paragraph to the contrary notwithstanding, an
indemnifying party shall not be liable for the settlement of any action, suit,
claim or proceeding effected without its prior written consent (which consent in
the case of an action, suit, claim or proceeding exclusively seeking monetary
relief shall not be unreasonably withheld or delayed). Such indemnification
shall remain in full force and effect irrespective of any investigation made by
or on behalf of an indemnified party.

                  (vi) If the indemnification from the indemnifying party as
provided in this Section 2(f) is unavailable or is otherwise insufficient to
hold harmless an indemnified party in respect of any losses, claims, damages,
liabilities or expenses referred to therein, then the indemnifying party shall
contribute to the amount paid or payable by such indemnified party as a result
of such losses, claims, damages, liabilities or expenses in such proportion as
is appropriate to reflect the relative benefits received by and the relative
fault of the indemnifying party and indemnified parties in connection with the
actions which resulted in such losses, claims, damages, liabilities or expenses.
The relative fault of such indemnifying party shall be determined by reference
to, among other things, whether any action in question, including any untrue (or
alleged untrue) statement of a material fact or omission (or alleged omission)
to state a material fact, has been made, or relates to information supplied by
such indemnifying party or such indemnified party, and the parties' relative
intent, knowledge, access to information and opportunity to correct or prevent
such action. The amount paid or payable by a party as a result of the losses,
claims, damages, liabilities and expenses referred to above shall be deemed to
include, subject to the limitations set forth in Section 2(f)(v) hereof, any
legal or other fees or expenses reasonably incurred by such party in connection
with any such investigation or proceeding. Notwithstanding the foregoing, no
Participating Holder shall be liable hereunder in an amount exceeding the net
proceeds to be received by such Participating Holder (before deducting expenses)
from the sale of Registrable Securities hereunder.

         The parties hereto agree that it would not be just and equitable if
contribution pursuant to this Section 2(f) were determined by pro rata
allocation or by any other method of allocation that does not take into account
the equitable considerations described above. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation.

         If, however, indemnification is available under this Section 2(f), the
indemnifying parties shall indemnify each indemnified party to the fullest
extent provided in Sections 2(f)(i) through 2(f)(v) hereof without regard to the
relative fault of said indemnifying party or indemnified party or any other
equitable consideration.


                                       12
<PAGE>   13
         (g) Certain Requirements in Connection with Registration Rights. If the
holders of Registrable Securities initially requesting such Demand Registration
have entered into one or more underwriting agreements in connection therewith,
or if a proposed registration under Section 2(b) involves an underwritten
offering, all shares constituting Registrable Securities to be included in such
registration shall be subject to such underwriting agreements and no person may
participate in such registration unless such person agrees to sell his or its
securities on the basis provided in the underwriting arrangements and completes
all questionnaires, powers of attorney, indemnities, underwriting agreements,
"lock up" letters and other documents which are reasonable and customary under
the circumstances.

         Section 3. Rule 144(c)

         Infinity shall file the reports required to be filed by it under the
Securities Act and the Exchange Act and the rules and the regulations of the
Commission thereunder so as to make available current public information to the
extent required to enable any Qualified Holder to sell Registrable Securities
without registration under the Securities Act pursuant to Rule 144 (or any
similar rule or regulation); provided, however, that Infinity's compliance with
the requirements of this Section 3 and the availability of Rule 144 for the sale
of any Qualified Holders securities shall not limit a Qualified Holder's rights
to request registration under this Agreement so long as such person's securities
constitute Registrable Securities within the meaning thereof under this
Agreement.

         Section 4. Notices.

         All notices, requests, claims, demands and other communications
hereunder shall be in writing and shall be given (and shall be deemed to have
been duly given upon receipt) by delivery in person, by cable, telegram,
confirmed facsimile or telex, or by first class mail (postage prepaid, return
receipt requested), to the other party as follows:

        if to Infinity to:    Infinity Broadcasting
                              Corporation
                              40 West 57th Street
                              New York, New York 10011
                              Attention:  Chief Financial Officer
                              Facsimile:  (212) 314-9336

        with copies to:       CBS Corporation
                              51 West 52nd Street
                              New York, New York 10019
                              Attention:  General Counsel
                              Facsimile:  (212) 597-4031

                                      and

                              Weil, Gotshal & Manges LLP
                              767 Fifth Avenue
                              New York, New York  10153


                                       13
<PAGE>   14
                              Attention:  Howard Chatzinoff, Esq.
                              Facsimile:  (212) 310-8007

        if to the             William S. Levine
        Stockholders to:      Pacific Companies
                              1702 East Highland Avenue
                              Suite 310
                              Phoenix, Arizona 85016
                              Facsimile: (602) 248-0884

        with copies to:       Arturo R. Moreno
                              Outdoor Systems, Inc.
                              2502 N. Black Canyon Highway
                              Phoenix, Arizona 85009
                              Facsimile:  (602) 269-8867

                                      and

                              Powell, Goldstein, Frazer &
                              Murphy LLP
                              Sixteenth Floor
                              191 Peachtree Street, N.E.
                              Atlanta, Georgia. 30303
                              Attention:  William B. Shearer, Jr., Esq.
                              Facsimile:  (404) 572-5958

         or to such other address as the person to whom notice is given may have
previously furnished to the other in writing in the manner set forth above.

         Section 5. Entire Agreement. This Agreement represents the entire
agreement and understanding among the parties hereto with respect to the subject
matter hereof and supersedes any and all prior oral and written agreements,
arrangements and understandings among the parties hereto with respect to such
subject matter; and can be amended, supplemented or changed, and any provision
hereof can be waived, only by a written instrument making specific reference to
this Agreement signed by Infinity, on the one hand, and the holders of a
majority of the Registrable Securities on the other hand.

         Section 6. Parties in Interest. This Agreement shall be binding upon
and inure solely to the benefit of each party hereto and its successors and
permitted assigns, and nothing in this Agreement, express or implied, is
intended to or shall confer upon any other person any rights, benefits or
remedies of any nature whatsoever under or by reason of this Agreement.

         Section 7. Descriptive Headings. The descriptive headings herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.



                                       14
<PAGE>   15
         Section 8. Governing Law. This Agreement shall be governed by,
construed and enforced in accordance with the laws of the State of New York,
applicable to contracts to be made, executed, delivered and performed wholly
within such state and, in any case, without regard to the conflicts of law
principles and policies of such state.

         Section 9. Severability. If any term or other provision of this
Agreement is invalid, illegal or unenforceable, all other provisions of this
Agreement shall remain in full force and effect so long as the economic or legal
substance of the transactions contemplated hereby is not affected in any manner
materially adverse to any party.

         Section 10. No Waiver. The failure of any party at any time or times to
require performance of any provision hereof shall not affect the right at a
later time to enforce the same. No waiver by any party of any condition, and no
breach of any other provision, term, covenant, representation or warranty
contained in this Agreement, whether by conduct or otherwise, in any one or more
instances, shall be deemed to be construed as a further or continuing waiver of
any such condition or of the breach of any other provision, term, covenant,
representation or warranty of this Agreement.

         Section 11. Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same original agreement.

         Section 12. No Inconsistent Rights. Infinity will not hereafter enter
into any agreement with respect to its securities which is inconsistent in any
material respect with the rights granted to the holders of Registrable
Securities in this Agreement. Except for any rights inconsistent with those
granted by Infinity pursuant to the Intercompany Agreement, dated as of December
15, 1998, by and between Infinity and CBS Corporation, Infinity is not a party
to any agreement, with respect to any of its securities, granting any
registration rights to any person, which agreement is or may be inconsistent
with the rights granted to the holders of Registrable Securities in this
Agreement and is in effect on the date hereof.

         Section 13. Execution by Stockholders. The obligations of Infinity
under this Agreement shall be irrevocable but the rights of any Shareholder
under this Agreement with respect thereto shall be and become effective only
upon the delivery to Infinity by any Qualified Holder requesting registration
under this Agreement of a duly executed counterpart signature page to this
Agreement.

                        [SIGNATURES BEGIN ON NEXT PAGE]


                                       15
<PAGE>   16
                 SIGNATURE PAGE TO REGISTRATION RIGHTS AGREEMENT

     IN WITNESS WHEREOF, Infinity has caused this Registration Rights Agreement
to be executed and delivered by its officers thereunto duly authorized as of the
date first above written.

                                        INFINITY BROADCASTING CORPORATION



                                        By __________________________________
                                           Name:
                                           Title:


                                           __________________________________
                                           STOCKHOLDER


                                       16

<PAGE>   1
                                                                    Exhibit 99.5

                  OUTDOOR SYSTEMS, INC. TO MERGE WITH INFINITY;
                COMPANY POSTPONES ANNUAL MEETING OF STOCKHOLDERS


             PHOENIX -- (May 27, 1999) -- Outdoor Systems, Inc. (NYSE: OSI)
      today announced that it has entered into a merger agreement with Infinity
      Broadcasting Corporation (NYSE: INF) under which the Company's
      stockholders will receive 1.25 shares of Infinity stock for each share of
      Outdoor Systems stock they own. The transaction is valued at approximately
      $8.3 billion in stock and debt.

             In light of these developments, the Board of Directors of Outdoor
      Systems, Inc. has postponed indefinitely its 1999 Annual Meeting of
      Stockholders, which had been scheduled for 4 p.m. (PDT) on Thursday, May
      27.

             Under the terms of the agreement, Arte Moreno, President and Chief
      Executive Officer of Outdoor Systems, Inc., will become Chief Executive
      Officer of the new Outdoor Systems, a wholly-owned subsidiary of Infinity.
      Moreno will also join the Board of Directors of Infinity Broadcasting
      Corporation. Under the agreement, William Levine, Chairman of Outdoor
      Systems, Inc., will also join the Infinity Board of Directors.

             "We are very pleased to become part of Infinity and create the
      leading out-of-home media company in the world," Moreno said. "We strongly
      believe that the combination of Outdoor Systems with Infinity is a very
      attractive opportunity for the shareholders and employees of OSI. The new,
      combined company better positions us to serve our clients."

             The transaction is subject to certain closing conditions, including
      regulatory approvals and approval by OSI shareholders, and is expected to
      close in the fall of 1999.

             Outdoor Systems, Inc. is the largest out-of-home media company in
      the United States, Canada and Mexico, operating approximately 237,500
      bulletins, posters, transit shelters, subway, mall displays and sports
      marketing services in North America.

<PAGE>   1
                                                                    Exhibit 99.6

                      INFINITY BROADCASTING CORPORATION TO
                             ACQUIRE OUTDOOR SYSTEMS

       COMPANIES COMBINE TO FORM WORLD'S PREMIER OUT-OF-HOME MEDIA COMPANY


         NEW YORK, N.Y., May 27 -- Infinity Broadcasting Corporation (NYSE: INF)
and Outdoor Systems, Inc. (NYSE: OSI) today announced a definitive agreement by
which Infinity will acquire Outdoor Systems for approximately $6.5 billion in
Infinity common stock, plus the assumption of approximately $1.8 billion of
debt.

         The transaction was announced today by Mel Karmazin, Chairman and Chief
Executive Officer, Infinity Broadcasting Corporation, and Arte Moreno, President
and Chief Executive Officer of Outdoor Systems, Inc.

         Under the terms of the definitive agreement, which was unanimously
approved by the Boards of Directors of Infinity Broadcasting and Outdoor
Systems, Inc., Infinity will acquire Outdoor Systems in a transaction in which
each share of Outdoor Systems' common stock will have the right to receive
consideration of 1.25 shares of Infinity Class A common stock. Under the terms
of the agreement, there are no floors or ceilings in determining the exchange
ratio. CBS Broadcasting, Inc., the parent of Infinity, has agreed to vote its
interest in Infinity, which represents 95.8% of the combined voting power of
Infinity common stock, in favor of the transaction.

         Infinity will therefore issue approximately 250 million shares (on a
fully-diluted basis) valued at $6.5 billion, based on an Infinity share price of
$26. With the assumption of $1.8 billion of Outdoor Systems' debt, the
transaction is valued at approximately $8.3 billion.

         Upon closing of the acquisition, Mr. Moreno will become Chief Executive
Officer of the new Outdoor Systems, a wholly owned subsidiary of Infinity. He
will also join the Board of Directors of Infinity Broadcasting Corporation. At
the same time, William Levine, Chairman of Outdoor Systems, will also join the
Infinity Board of Directors. Mr. Moreno and Mr. Levine have agreed to vote their
shares, representing approximately 26% of the Outdoor Systems shares
outstanding, in support of the announced acquisition.

         Mel Karmazin, Chairman and Chief Executive Officer, Infinity
Broadcasting Corporation, said: "The acquisition of Outdoor Systems' outstanding
portfolio of out-of-home media assets extends our reach and establishes Infinity
as the undisputed leader in the outdoor advertising business. Our new,
industry-leading outdoor advertising company, combined with the biggest and best
radio company in the business, will make Infinity the premier local advertising
platform, one that is second to none."

         Mr. Karmazin added: "Arte Moreno and Bill Levine have done an
outstanding job of assembling the finest outdoor assets in the United States,
Canada and Mexico. I am looking forward to working with Arte in growing the
revenues and cash flow of the combined company."
<PAGE>   2
         Arte Moreno, President and Chief Executive Officer of Outdoor Systems,
Inc. stated: "We are very pleased to become part of Infinity and create the
leading out-of-home media company in the world. We strongly believe that the
combination of Outdoor Systems with Infinity is a very attractive opportunity
for the shareholders and employees of OSI. The new, combined company better
positions us to serve our clients."

         Mr. Karmazin added that the acquisition of Outdoor Systems will be
immediately accretive to Infinity on an after-tax cash flow basis.

         Outdoor Systems is the pre-eminent outdoor advertising company in the
business, with approximately 112,000 bulletin, poster, mall and transit
advertising display faces in 90 metropolitan markets in the United States, 13
metropolitan markets in Canada and 44 metropolitan markets in Mexico, and
125,000 subway displays in New York City. OSI has operations in 50 of the 50
largest United States markets, 13 of the 15 largest Canadian markets and 44 of
the largest 45 markets in Mexico. It will expand Infinity's existing outdoor
advertising company, TDI, which operates 2,000 display faces and more than
1,000,000 other transit displays worldwide. The transaction will make Infinity
the largest outdoor media company in the world.

         William Apfelbaum, President and Chief Executive Officer of TDI,
commented: "We're very proud of the job that TDI has done in the last several
years. The outdoor advertising business has grown significantly and has been an
important contributor to the overall success of Infinity. It has also helped to
spawn an entirely new sales organization -- CBS Plus. Outdoor Systems is a very
exciting acquisition, and I look forward to working with Arte and his fine
organization as we move forward to make the most of the synergies between radio
and outdoor, and between Infinity and the entire CBS family." Mr. Apfelbaum will
also continue his leadership role of CBS Plus.

         Mr. Karmazin added: "Extending our reach in outdoor media will also
provide an improved platform for growth for our local radio and CBS television
stations and the CBS Television Network, which is now #1 in total viewers and
households nationwide. We are also enthusiastic about the impact this new,
expanded outdoor presence will have on our growing portfolio of internet
properties, which are highly dependent on branding for customer awareness on a
local and national level."

         The transaction is subject to certain closing conditions, including the
expiration of the Hart-Scott-Rodino waiting period and the approval of Outdoor
Systems and Infinity Broadcasting shareholders, and is expected to close in the
fall of 1999.

         Infinity Broadcasting Corporation operates more than 160 radio
stations, as well as TDI, the Company's outdoor advertising business. Infinity
also manages and holds an equity position in Westwood One, Inc. Infinity
Broadcasting Corporation is a subsidiary of CBS Corporation. Upon completion of
this transaction, CBS will own 700 million shares of Infinity.
<PAGE>   3
         Chase Securities, Inc. provided the Board of Directors of Infinity
Broadcasting Corporation with a fairness opinion on this transition. B.T. Alex
Brown advised Outdoor Systems, Inc. on the transaction.

Note: Certain statements in this press release constitute "forward-looking
statements" within the meaning of the Private Securities Litigation Reform Act
of 1995. Such forward-looking statements involve known and unknown risks,
uncertainties and other factors which may cause the actual results, performance
or achievements of the Company to be materially different from any future
results, performance or achievements expressed or implied by such
forward-looking statements. Reference is made to the Company's Annual Report on
Form 10-K for the 1998 year filed with the Securities and Exchange Commission
for additional information concerning such risks and uncertainties.


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