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!

BEYONCÉ

"Wow Jay and Beyoncé, uhhh umm wow, yeah!" Tweeted Bieber, who stole Knowles away from husband Jay-Z to snap this photo at 2010 Grammy Awards.