Late Show with David Letterman S15 E02 Danny DeVito, Larry David, Avril Lavigne

Dave apologizes to Sue Hum for a pre-show accident; the show is interrupted by a performance of "Mark Twain Tonight!" starring Johnny Dark; Danny Devito plugs his new restaurant; Larry David (in his very first Late Show appearance) comments on Dave's hair; Avril Lavigne performs "When You're Gone."