Last night's 2009 American Music Awards proved to be a star-studded event, full of fashion highlights and performance pratfalls.

Check out your favorite celebs on the red carpet and onstage to see who got it right and who totally missed the fashion mark... by a long shot.

Alicia Keys, J. Lo and Carrie Underwood were several of our favorite red carpet to on-stage quick outfit changes.

Then leave a comment with your vote for best and worst dressed!