Celebs Shine on 2012 Billboard Music Awards Red Carpet in Las Vegas

Some of the biggest names in music walked the red carpet at the 2012 Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas on Sunday May 20, 2012. The ABC telecast included performances from Kelly Clarkson, Carrie Underwood, Justin Bieber, LMFAO, The Wanted, Nelly Furtado, Usher, Linkin Park and Chris Brown. Katy Perry debuted a new song, “Wide Awake,” on the telecast, and Whitney Houston was posthumously honored with the Billboard Millennium Award.

Lisa Marie Presley looking radiant as ever. She debuts and promotes her first ever single.

Dancing With the Stars favorite Gavin DeGraw takes a bow as he walks the red carpet.

A stellar Julianne Hough walks the red carpet for the 2012 Billboard Music Awards at the MGM Grand on the Las Vegas Strip. Watch out for the release of her star-studded Summer movie Rock of Ages.

Carrie Underwood knocked it out of the park with her shimmery eye makeup, sexy locks and powder blue ballgown.

The Perfect Boyfriend? Justin Bieber walks the red carpet to the screams of adoring fans.

She's all grown up! Miley Cyrus leaves Hanna Montana behind as she struts the red carpet in a daring outfit. Oh... and we love that eclipse necklace too.

Usher's got the {baby} blues... Photo courtesy of Billboard Music Awards.

The Lady in Red. Taylor Swift was Red and Haute this evening. Photo courtesy of Billboard Music Awards..

The elegant Katy Perry performed a new song at this year's awards called “Wide Awake" . Photo courtesy of Billboard Music Awards.