Alicia Keys arrives at the 55th Annual Grammy Awards in an Azzedine Alaia dress on Sunday, Feb. 10, 2013, in Los Angeles.
Katy Perry shows off her figure in a Gucci gown.
Beyonce strikes a pose in a black jumpsuit by Osman and a Swarovski clutch.
Rihanna is red hot in a custom Azzedine Alaia dress.
John Mayer arrives at the Grammys in a rich blue suit.
Jennifer Lopez shows off some leg in an Anthony Vaccarello dress and Tom Ford heels.
Fun. hug it out at as they arrive on the Grammys red carpet.
Carly Rae Jepsen strikes a pose in her Roberto Cavalli dress.
Faith Hill, in a knee-length J. Mendel, poses with husband Tim McGraw.
Carrie Underwood shows off not only a lovely Roberto Cavalli dress, but also 381 carats of diamonds worth more than $31 million.
Frank Ocean arrives at the 55th Annual Grammy Awards.
Janelle Monae opts for something a little different for the Grammys: a Moschino jacket, Against Nature shirt and vest, and a Ralph Lauren hat.
Best new artist nominees The Lumineers arrive on the red carpet.
Jack White is in nearly head-to-toe black.
Host LL Cool J is white hot on the red carpet.
Country singer Hunter Hayes pairs his slick black suit with tennis shoes.
Neil Patrick Harris, left, shows off his partner, David Burtka, on the red carpet. Both men wore John Varvatos.
DJ Al Walser goes out on a limb in a spacesuit.
Singer RedFoo of LMFAO shows off some leg on the Grammys red carpet.
Taylor Swift goes Grecian in a J. Mendel gown with metallic beaded bodice.
Adele goes floral in a red Valentino.
Chris Brown arrives at the Grammys in stunning white.
Country singer John Paul White arrives at the Grammys.
Mumford & Sons arrive at the Grammys.
Justin Timberlake is suave in a Tom Ford suit at the Grammys.
Kimbra, left, shows off a daring Jaime Lee Major dress, while Gotye wears Jack London.
Things were far from gray when Skylar Grey showed up in a red-hot backless gown.
Rock band Alabama Shakes arrives at the 55th annual Grammy Awards.
Model Karlie Kloss poses in a Michael Kors dress and shoes.
"NCIS" star Pauley Perrette arrives at the Grammys.
Lisa D'Amato arrives at the 55th annual Grammy Awards on Sunday, Feb. 10, 2013, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)