Double duty for U2 on their third night in a row appearing as the musical guest for the Late Show with David Letterman: early on they participated in a self-referential Top 10 list (in which guitarist The Edge took an unscripted jab at Sting) and they closed out the show with a rendition of "I'll Go Crazy if I Don't Go Crazy Tonight" from their new album, No Line on the Horizon.
Jimmy Fallon's monologue was OK; The Roots were great. Musical guest was Crap Your Pants, um, Clap Your Hands Say Yeah. Suffice to say, we didn't stay tuned for that nonsense.
