Watch Usher’s Duet With Justin Bieber For His 17th Birthday!

The American Cancer Society put up this remixed video for Biebs' big day - best present ever!

First Justin Bieber performed alongside Usher at the 2011 Grammy Awards, and now they’re taking their two-man show to the internets! Check out this video mash-up of the superstars’ “Happy Birthday” commercials for the American Cancer Society, remixed by Mysto & Pizzi and Agent Jackson.


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