as the former Late Night with David Letterman Host unexpectedly popped up during Jimmy Fallon's Tonight Show monologue. The hilarious moment came alongside Paul Shaffer and the World's Most ...

David Letterman hosted his final "Late Show" Wednesday night. After entering the stage to a standing ovation, Letterman urged people to "please be seated" so he could deliver his last monologue.

Late night TV legend David Letterman made a surprise appearance on NBC’s “Tonight Show” on Monday night during host Jimmy Fallon’s opening monologue. It was Letterman’s first appearance ...