Justin Bieber sings to his Baby on David Letterman Show

Justin was one bustling small Bieber on Tuesday (March 23).For those who didnt get their fill of Justin Bieber crooning to his "Baby" on "The View" Tuesday morning, he sang his strike again on "The Late Show With Letterman." In Biebers "Late Show" performance, he raps Ludacris" "Baby" verses, and he does a little flattering well-spoken dance moves. And lots of hopping up and down.All this in an bid to foster his album, "My World 2.0," that was expelled on the same day.Up shortly for the teenager sensation: behaving on "Saturday Night Live", Apr 10.Followon Twitter and Facebook and Zap2itChristine on Twitter for the ultimate movies, TV and luminary news.More Justin Bieber Dish:&

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Photo credit: CBS