David Letterman welcomed the always funny Jon Stewart--who's celebrating his 10th anniversary as host of The Daily Show--and members of the World Baseball Classic's Team USA to read the Top 10 list; U2 was both on the couch for an interview and closed out the show with a stirring version of "Beautiful Day", which paid tribute to The Ramones, quoting "Rock and Roll High School" and "I Remember You" in it coda. (Letterman also mentioned the Irish rockers would be performing a song exclusively for the studio audience after Late Night's taping. Very, very cool.)
Meanwhile, Jimmy Fallon jumped into night four's opening monologue rather harshly and without pause; Ludacris performed with The Roots (who recently spoke to Rolling Stone about their new late night gig).
