Justin Bieber's Party Pals

Kim Kardashian! Katy Perry! See the stars sure to wish the singer a very happy birthday when he turns 17 on March 1!

  • USHER
 photo | Justin Bieber, Usher

Credit: Courtesy Justin Bieber

Updated: Tuesday Mar 01, 2011 | 06:00 AM EST By: Cara Lynn Shultz

USHER

After performing together at the Grammys, Usher – whom Bieber dubbed his "big bro" – joined his protégé at the Paris premiere of Bieber's documentary concert film, Never Say Never.