Rihanna
Rihanna looks red hot in this custom Azzedine Alaia dress, Neil Lane jewelry and Manolo Blahnik shoes. The singer has three nominations, for "Talk That Talk," "We Found Love" and "Where Have You Been."
Taylor Swift
Taylor Swift, who will open the show, wears a white J. Mendel gown and pairs it with a braided hairstyle on the red carpet.
Ashanti
Singer Ashanti wears a black Tony Ward Couture gown on the red carpet at the Grammys.
Justin Timberlake
It will be quite a night for Justin Timberlake (wearing a Tom Ford suit and tie on the red carpet). The singer, who will perform during the show, will host his first live concert in years at the Hollywood Palladium right after the Grammys.
Chris Brown
Chris Brown wears a white Lanvin suit and a David Yurman scarab ring on the red carpet. The singer tells E! that the annual awards show is "a great and elegant place to be."
Ed Sheeran
English singer Ed Sheeran poses on the red carpet. He's nominated for song of the year for "The A Team."
Katy Perry
Katy Perry, who will present on the main telecast, poses for photographers in a Gucci gown. She lost the best pop solo performance Grammy, where she was nominated for "Wide Awake," to Adele.
Wiz Khalifa and Amber Rose
Wiz Khalifa and Amber Rose revealed the due date for their first baby on the red carpet. "I'm due on the 24th," Rose told MTV. "But you know, babies can come a week before, a week after. You never know. So we got a couple weeks left."
Estelle, nominated for best R&B performance for "Thank You," wears a Genelle Brooks x Love Collins dress with Brian Atwood shoes.
Kelly Osbourne
Kelly Osbourne, host of Fashion Police, wears a black Paule Ka cut-out dress on the red carpet.
Kimbra and Gotye
Kimbra and Gotye, who collaborated on the 2011 single "Somebody That I Used to Know," arrive at the Grammys. Kimbra wears Australian designer Jaime Lee Major, and Gotye wears Jack London.
Jennifer Lopez
Jennifer Lopez showed off her legs in a revealing black Anthony Vaccarello gown with Tom Ford sandals on the Grammys red carpet.
M83, nominated for Hurry Up, We're Dreaming for best alternative music album, arrive at the Grammy Awards.
Natasha Bedingfield
Natasha Bedingfield dons a flowing red Emerson dress with a Demarco ring on the 55th annual Grammy Awards red carpet.
Red Foo
LMFAO's Red Foo had a little bit of fun posing for the cameras, taking it up a notch with the crazy.
Skrillex
Skrillex took home three early Grammys in the pre-show telecast: best dance recording, best dance/electronica album and best remixed recording.
Mumford & Sons
Mumford & Sons, nominated for multiple Grammys including album of the year, lost out to Bonnie Raitt for best Americana album but picked up an early trophy in the pre-show telecast.
Skylar Grey
Singer Skylar Grey, in Giorgio Armani, reflected on her 2011 performance with Eminem and Dr. Dre days before this year's Grammys: "That was my ultimate dream. Every year I looked forward to watching them and watching the performances."
Trey Songz
Grammy-nominated Trey Songz poses for photographers on the red carpet. He is nominated for best R&B song for "Heart Attack."
Six-time Grammy winner Adele was beaming in a red patterned knee-length Valentino dress. The British singer, nominated for an Oscar for Skyfall's theme song, is up for the best pop solo performance Grammy for "Set Fire to the Rain (Live)."
Lisa D’Amato
Lisa D'Amato, who was a contestant on America's Next Top Model, recently had a scary accident on a film set when she fell, landed face first, and broke her nose. But she seems to have recovered, wearing this bright outfit on the red carpet at the Grammys.
Alicia Keys and Swizz Beatz
Alicia Keys and Swizz Beatz pose together on the red carpet. Before arriving, Keys, wearing a black Azzedine Alaia dress, tweeted: “About to step onto the red carpet at the #GRAMMYs! Still such a thrill! Soaking in this moment real quick."
Allison Williams
Girls star Allison Williams accompanied Katy Perry to the Grammy. Williams wears Kaufman Franco on the red carpet.
Beyonce, who performed the half-time show at the Super Bowl one week earlier, arrives at the Grammys wearing an black-and-white Osman jumpsuit, with a Swarovski clutch and Lorraine Schwartz jewelry.
Carly Rae Jepsen and Matthew Koma
Carly Rae Jepsen and boyfriend Matthew Koma arrive at the Grammys. Nominated for song of the year and best pop solo performance for “Call Me Maybe,” Jepsen wears a Roberto Cavalli dress.
Faith Hill
Country singer Faith Hill, who will present at the Grammys, wears a black J. Mendel dress and a unique accessory: clear braces on her teeth.
Florence Welch
Florence Welch wears a shiny green Givenchy ensemble on the carpet. She is nominated for best pop vocal album for Ceremonials.
Frank Ocean
Frank Ocean is nominated for six Grammys. When Ocean found out about his nominations, he told MTV: "I think it's an honor. It's a peer-based system. I owe it to all the people around me."
Jack White
Jack White, who graced the cover of THR's music issue, arrives at the Grammys.
Janelle Monae
Janelle Monae, nominated for best pop duo/group performance for her collaboration on “We Are Young” with Fun, arrives wearing an Against Nature vest and shirt, a Moschino jacket and a Ralph Lauren hat.
John Mayer
John Mayer walks without current girlfriend Katy Perry on the Grammy red carpet. Perry took along Girls star Allison Williams as her date for the red carpet.
Kaley Cuoco
CBS made sure their primetime shows were well-represented on music's biggest night, with The Big Bang Theory's Kaley Cuoco showing her edge with a gold Armen black blazer, a simple white T-shirt, leather leggings and a Stark clutch.
Nicole Kidman and Keith Urban
Nicole Kidman, in a gold Vera Wang gown and Fred Leighton jewels, accompanies her husband, American Idol judge and country singer Keith Urban.
Kelly Rowland
Kelly Rowland, who reunited with Destiny's Child's Beyonce and Michelle Williams for the Super Bowl halftime show, dons a black Georges Chakras gown.
The Lumineers
Folk rock group The Lumineers is up against fun., Alabama Shakes, Hunter Hayes and Frank Ocean for best new artist. The band was nominated for Americana album for its self-titled debut but lost to Bonnie Raitt.
Maria Menounos
Television personality Maria Menounos smiles for photographers in a pale yellow Gomez-Gracia dress.
Miranda Lambert
Country singer Miranda Lambert, dressed in Roberto Cavalli, took the Grammy stage with Dierks Bentley to perform a medley of "Home" and "Over You." She is up for best country album for Four the Record.
Ne-Yo
Ne-Yo was nominated for a Grammy for best dance recording for "Let's Go" with Calvin Harris, but lost to Skrillex.
Neil Patrick Harris and David Burtka
How I Met Your Mother star Neil Patrick Harris, who was a presenter, and his longtime partner David Burtka walk the red carpet.
Travis Barker
Travis Barker will take the stage alongside Grammys host LL Cool J, Chuck D, DJ Z-Trip and Tom Morello for a special performance during the three and a half hour telecast.
Alicia Keys and Swizz Beatz
Alicia Keys, in in Azzedine Alaia, walks the carpet with husband Swizz Beatz. The couple have a 2-year-old son, Egypt.
Alexa Chung
Alexa Chung poses in Valentino Red.
Christine Teigen, John Legend
John Legend walks the red carpet with his fiancee, Christine Teigen, who wore a Joy Cioci gown.
Dave Grohl and Jordyn Blum
The Foo Fighter walks the red carpet with his wife, Jordyn Blum.
Diplo
The producer-D recently made No. 12 on THR's Top Hitmakers list.
Drake
Drake won best rap album for Take Care.
Jay Manuel
Jay Manuel, who previously was on America's Next Top Model, walks the red carpet.
Kathy Griffin
Kathy Griffin strikes a pose for photographers.
Natalie La Rose and Flo Rida
Rapper Flo Rida walks the red carpet with singer Natalie La Rose, who sings on his hit song "Good Feeling."
Neil Portnow
Neil Portnow is the president the National Academy of Recording Arts and Sciences.
Pharrell Williams and Helen Lasichanh
Pharrell Williams arrives at the Grammys with his fiancee, Helen Lasichanh.
Quincy Jones and Blush
Producer Quincy Jones poses with girl group Blush.
Randy Jackson
American Idol judge Randy Jackson hits the Grammys with a guest.
Zac Brown Band
The Zac Brown Band, winner of best country album, poses on the red carpet.
Riff Raff
Riff Raff is signed to producer Diplo's record label Mad Decent.
Bonnie McKee
The singer-songwriter-actress arrives at the 55th annual Grammy Awards.
Julie Chen and Leslie Moonves
CBS Corp. president and CEO Leslie Moonves hits Sunday night's awards show with his wife, The Talk host and moderator Julie Chen.
Jenna Jameson
The former p*rn star strikes a pose.
Dierks Bentley and Cassidy Black
Dierks Bentley and his wife, Cassidy, celebrated their seventh wedding anniversary in December.
Kaya Jones
The Canadian-American singer-actress was a member of girl group The puss*cat Dolls from 2003-06.
Baron Davis
The pro basketball player most recently played for the New York Knicks.