Katy Perry, Bruno Mars, Justin Bieber and More Spread Holiday Cheer at Jingle Ball 2010

Paramore didn't have any big special guests during their set, but the punk-pop band enlisted Molly, a fan from the audience, to take over the vocals during the bridge of 'Misery Business' -- and the 16-year-old did so in full-on head-banging glory. Enrique Iglesias followed suit when he brought Rachel, a high school junior, to the stage and serenaded her with 'Hero.'

"I'll be your prom date," the Latin pop singer told her as he slow danced with her and kissed her on the forehead and cheek to seal the moment.

Michael Buble might not be what you would call one of today's biggest pop stars, but he brought his own modern jazzy flair on 'Haven't Met You Yet' and made the girls -- and their moms -- swoon when he jumped into the audience to sing, 'Let It Snow.' Former Disney princess Selena Gomez may not have invited any special guests onstage, but she and her band the Scene brought down the house with 'Naturally,' 'Round & Round' and 'A Year Without Rain.' But it was her performance of 'Rock God,' a song which Katy Perry penned for the budding artist's latest record, that Gomez really put her all in it -- perhaps to make the songwriter and her idol proud.

In true Katy Perry fashion, her performance featured pyro, elaborate sets and a sexy-sweet one-piece. Dressed as a toy soldier, Perry brought her twist on the 'Nutcracker' with ballerinas in gold tutus and even came out of a giant wrapped present at the beginning of her set. Being a Jingle Ball veteran, Perry thanked the night's host, New York City radio station Z100, for helping her get to the top.

"I remember when I came on, and I was really scared," Perry said before performing 'I Kissed a Girl.' "Obviously now I'm not scared anymore -- if you didn't' notice this outfit -- and I sang this song, and I'm going to do a remix of it now. Thank you Z100 for breaking that song and changing my life."

While each of the performances seemed to get bigger and bigger as the night wore on, it wasn't until Justin Bieber's set that things really heated up. "I don't know guys, it's getting hot in here," Kim Kardashian said as she introduced the teen megastar. "I think I'm getting a Bieber fever."

Dressed casually in khakis and a plaid button-down, Beiber opened his performance with 'Somebody to Love,' his duet with Usher, who couldn't make it that night since he had his own show in Newark, N.J. "It feels good to be back at Madison Square Garden," Bieber said. "I was at Jingle Ball [last year] and I broke my foot. I was limping but now all my limbs are working. And I love being in New York!"

Though he didn't suffer any more injuries, Bieber's set was full of surprises. Not only did he show the trailer to this new documentary, 'Never Say Never,' he also brought Jaden Smith to the stage to perform the title track. The two kept the party going by showing off their dance skills, doing both the Jerk to New Boyz's 'You're a Jerk' and the Dougie. He also invited Sean Kingston to perform with him on 'Eenie Meenie,' before closing out the epic night with his biggest song, 'Baby,' leaving the world's most famous arena screaming in delight.

The 2010 Jingle Ball airs Thursday, Dec. 16 at 9PM ET on Fuse.

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• Celebrity Holiday