EXHIBIT 99.1

Infinity Broadcasting Completes Acquisition of Outdoor Systems, Inc.

NEW YORK, Dec. 7 -- Infinity Broadcasting Corporation (NYSE: INF) has completed
its acquisition of Outdoor Systems, Inc. (NYSE: OSI), the company announced
today.

On May 27th, 1999, the companies announced the definitive agreement by which
Infinity would acquire Outdoor Systems for approximately $6.5 billion in
Infinity Class A common stock, plus the assumption of $1.8 billion of debt. The
transaction has been approved by the Boards of Directors and the shareholders of
both Infinity and Outdoor Systems. The Department of Justice approved the
transaction yesterday.

Outdoor Systems is the preeminent 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 the Mexico, and 125,000 subway
displays in New York City.

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.

Contact: /CONTACT: Farid Suleman of Infinity , 212-314-9215; or Gil Schwartz of
CBS, 212-975-2121



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