Las Vegas Sun - Photograph : Dean Martin and Frank Sinatra sing at the Sands

January 21, 2018

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Frank Sinatra and Dean Martin sing a duet together during a 1960s performance in the Sands' Copa Room. The Rat Pack was born when Sinatra joined Martin onstage to sing "Sleep Warm" at the Sands on Jan. 20, 1960.

Sun File Photo

Frank Sinatra and Dean Martin sing a duet together during a 1960s performance in the Sands' Copa Room. The Rat Pack was born when Sinatra joined Martin onstage to sing "Sleep Warm" at the Sands on Jan. 20, 1960.