Justin Bieber Rocks A Casual Look On The AMA Red Carpet!

Justin Bieber arrived at the American Music Awards in Los Angeles, California and looked more casual than ever on the red carpet!

The singer, who is performing tonight, wrapped his arm around friend Paula Abdul.

The Hollywood bad boy, 21, rocked a Nirvana T-shirt and ripped jeans!

His new album, "Purpose," is getting accolades from fans and critics alike.

What do you think about Justin's look? Tweet us @OKMagazine or let us know in the comments section below!