Last Night on Late Night: Conan Curses on Air, Duels Jack Black on Guitar

Last night on Conan, Conan O'Brien used some sweet profanity without being bleeped before challenging guest Jack Black to a guitar duel that was totally rigged in the host's favor. Over on The Late Show, David Letterman conducts the most epic assault on a Christmas tree since Kiefer "The Pirate" Sutherland, on The Tonight Show Javier Bardem explained why Christmas Eve offerings in Spain are way more rockstar than milk and cookies, and Craig Ferguson revealed the relatively small amount of money it would require to get him to defect to NBC, on The Late Late Show. Watch our compilation to see what you missed.