Julianne Moore, Rachel McAdams, Helen Mirren and Mark Ruffalo are among the stars at the 25th annual event.
Lady Gaga, Victoria and David Beckham, and Karlie Kloss are among the famous faces at the annual event.
The stars come out of the premieres of "The Big Short", "Concussion" and more.
The American Music Awards host did not skimp when it came to costume change!
With performances by Jennifer Lopez, Selena Gomez, One Direction, Justin Bieber and more!
See all the stars arriving on the 2015 AMAs red carpet!
Josh Jackson celebrates Golden Globes season, and Justin Bieber visits "Today."
See who will be rockin' the stage at the 2015 American Music Awards!
Named People's Sexiest Man Alive for 2015, take a look at some memorable moments and changing styles from the soccer stud.