Justin Bieber sings Baby ( David Letterman Live)

Justin Bieber sings Baby live by David Letterman. MY WORLD 2. 0 is out in I THANK U The GOLDEN TICKETS are out in the albums in the GOLDEN TICKETS and you could win the GRAND PRIZE: An all expense paid trip for you and 3 people to THE ATLANTIS Resort in the BAHAMAS to come on VACATION with ME and sit first row at my concert there and be my ONE LESS LONELY GIRL