Justin Bieber, Katy Perry Rock Out at Star-Studded AMAs

See the stars sizzle on the Red Carpet, and all of the night's best moments here.

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FilmMagic
LOS ANGELES, CA - NOVEMBER 21: Katy Perry performs onstage during the 2010 American Music Awards held at Nokia Theatre L.A. Live on November 21, 2010 in Los Angeles, California. (Photo by Michael Tran/FilmMagic) *** Local Caption *** Katy Perry
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Even though one pint-sized star ruled the night, there was still a lot to like about the 2010 American Music Awards, including a series of memorable performances including Katy Perry. Check out some highlights of the the big event.
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It was Justin Bieber's night as the Canadian won a total of four awards and became the youngest person to win the Artist of the Year award. Winners were chosen by fan votes, which might explain his knockout success.
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ASSOCIATED PRESS
Although Usher lost to Bieber, he was far from upset. "To see Justin take the award - having received that award before - it was like an out of body experience, you understand?" Usher said backstage. "It was emotional. I don't cry that often, but I did."
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Bieber performed at the show as well. The "Baby" singer won in every category in which he was nominated. And check out those snazzy kicks!
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Perched on a metal swing, Rihanna opened the night with "Love the Way You Lie Part 2"...
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ASSOCIATED PRESS
...before stripping down to a calypso-inspired outfit and breaking into her current No. 1 hit "What's My Name." She also took home some hardware, winning Favorite Soul/R & B Female Artist.
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EMPTY_CAPTION"This is amazing!" said an exuberant Rihanna, who danced onstage later to receive her award - favorite soul/R&B female.
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Frederick M. Brown
RiRi's gal pal, Katy Perry, also rocked the stage. Dancers ripped off her red dress to reveal a form-fitting jumpsuit during a performance of "Firework," complete with a boy's choir.
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Swift, last year's artist of the year, took home favorite country female. Swift said simply: "I just want to thank the fans."
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Taylor Swift, showing of her new locks, performed "Back to December" on a white baby grand.
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A pregnant Pink was among the evening's performance highlights.
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AP
Unlike last years performance marked by an erotic high-wire act, she stayed close to the ground to perform a high energy choreographed dance for her latest song, "Raise Your Glass."
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New Kids On The Block and the Backstreet Boys reunited as a boy band supergroup in advance of their 2011 summer tour.
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The group ran through a medley of some of their biggest hits, including "I Want it That Way" and "You Got It (The Right Stuff)". Backstreet's back, alright!
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In honor of her new movie "Burlesque," Christina Aguilera performed a number from the musical.
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The Black Eyed Peas, winners for favorite pop/rock band, gave a levitating performance, singing from boxes atop the stage during part of their performance of their new single, "The Time."
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AP
Aside from their odd 80's inspired performance, the group won an award for for favorite pop/rock band.
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Ke$sha had perhaps the night's most bizarre performance of the evening, performing her heavily Auto-Tuned hit "Take It Off."
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NBCConnecticut.com
After stripping down to a mirrored outfit, a pack of male dancers dressed like her, complete with blond wigs and fishnet stockings danced along side of her.
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Kid Rock gave a stirring, acoustic performance of "Times Like These," his song lifting up his hometown of Detroit during its recent economic struggles, from his new CD, "Born Free."
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Ne-Yo also gave a very sensual performance, dancing with only one woman on a nearly empty stage.
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Rapper Nicki Minaj had the most cumbersome looking outfit of the evening, with something like an exoskeleton on the outside of her dress.
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Dimitrios Kambouris/Getty Images for Victoria's Secret
Miley Cyrus performed in a shocking Gothic "Buffy the Vampire" meets "Unplugged" sort of way. Save the velvet for your seventies, Miley.
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Emily Sexton
Enrique Iglesias gives a heartfelt performance.
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Travis Pynenburg
Little Willow Smith made a big impression on the red carpet showing up wearing a one puffy sleeved yellow jacket belty thingy. Smith completed the outfit with black leather gloves and slouchy boots. The 10-year-old singer and budding fashionista was a presenter at the event.
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Never one for normalcy, Ke$ha shows up with a Mohawk and a dress made with what looks like actual video tape.
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Taylor Swift arrives at the American Music Awards, trading her signature curls for a surprisingly straight style. Swift is up for the Favorite Female Artist category.
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Heidi Klum arrives on the Red Carpet. The "Project Runway" host is reprising the role of host and serving as MC for the night's festivities.
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Members of New Kids on the Block and the Backstreet Boys pose on the Red Carpet. Both are slated to perform tonight.
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The Hester Family
Usher flashes some bling on the the Red Carpet. The AMA's started back in 1973, when Dick Clark created them to pay tribute to popular musicians.
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That's a lot of red! Rihanna, sporting her new, longer cherry-red locks wears an Ellie Saab Haute Couture dress to match. The singer is nominated for Favorite Female Artist.
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Miley Cyrus showed up in a surprisingly spring-like Marchesa dress with a long train, and equally long, straight strands.
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