Las Vegas Sun - Photograph : Lady Gaga-Bill Murray-David Letterman

January 18, 2018

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Bill Murray, center, takes a selfie with Lady Gaga and David Letterman during "The Late Show With David Letterman" on Wednesday, April 2, 2014, in New York. The singer had Murray, Letterman and the entire audience over to the Roseland Ballroom for her performance.

Jeffrey R. Staab / CBS / AP

Bill Murray, center, takes a selfie with Lady Gaga and David Letterman during "The Late Show With David Letterman" on Wednesday, April 2, 2014, in New York. The singer had Murray, Letterman and the entire audience over to the Roseland Ballroom for her performance.