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!

SHAQ

Peace, man! Bieber caught this shot with Shaquille O'Neal after the basketball star jumped on stage at the singer's Glendale, Ariz., concert to present him with four Teen Choice Awards surfboard trophies.