Justin Bieber rocked white jeans on the carpet at this evening's Teen Choice Awards in LA. He's on hand as a nominee in multiple categories. He's in the running for choice male artist, choice Summer music star, choice fashion icon, choice male hottie, and choice twit, for his Twitter use. Two of his songs, "Boyfriend" and "Die in Your Arms," are up for respective choice single by a male artist and choice love song honors. Win or lose, it's a special day for Justin. It's his girlfriend Selena Gomez's 20th birthday, and they're getting to spend the evening today with pals like Carly Rae Jepsen. Justin's also due to take the stage as one of the show's performers.