(AOL TV has the complete list of winners)
To see their dresses in full, click on the photo gallery below. Selena was wearing Armani, Nicki wore Oscar de la Renta, Katy wore Vivienne Westwood Couture (and rocked pink hair) and Taylor dazzled in Reem Acra. Also check out photos of Joe Jonas, Christina Grimmie, Sarah Hyland, Karmin and more! Who had your favorite look?
Gallery | 2011 AMAs
Selena, Katy, Nicki and Taylor weren't the only serious fashionistas at the AMAs this year. Elle and Blair Fowler made their AMA red carpet fashion expert debut during the live preshow. With millions and millions of video views on YouTube about their style and makeup expertise, who better to provide feedback on celebs' fashion and beauty choices?
Elle and Blair (and all the stars) had to brave the unusual cold and wet rainy weather in Los Angeles Sunday night. Check out this photo of rehearsals Elle tweeted of them wearing sweats under the cocktail dresses.
We're hoping they'll tweet their absolute favorite looks from the night soon, but the girls schedule is insane. "Such a hectic day! #AMAs we're amazing," Blair tweeted. "Thanks for all your support :) Now on my way to the airport to catch a flight!" Check out the photos below of Elle and Blair in action.
courtesy of Elle & Blair Fowler
Click here for Elle and Blair's live stream video replay!