In this photo released by CBS Entertainment, Justin Bieber, left, shows Late Show host David Letterman his tuxedo shirt during taping for CBS-TV's The Late Show with David Letterman Monday, Jan. 31. ... more 
In this photo released by CBS Entertainment, Justin Bieber, left, shows Late Show host David Letterman his tuxedo shirt during taping for CBS-TV's The Late Show with David Letterman Monday, Jan. 31. 2011, in New York. less 
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Associated Press | Photo By CBS, John Filo
Tue, Feb 1, 2011 4:05 PM EST