You knew David Letterman would have some great guests help to send him off as he winds down a memorable career on late night. Not surprisingly, the great Norm Macdonald is hilarious in his final Letterman appearance, but it is a bit surprising to see crusty Norm get so emotional. This one is worth watching . . .
Christina Aguilera found herself playing the Wheel of Musical Impressions on The Tonight Show with Jimmy Fallon. Both of them were pretty impressive with their impressions but Christina stole the show with an epic imitation of Britney Spears singing “This Little Piggy.”