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Katy Perry indulged in all manner of teenage dreams during her cohosting gig last night at the Teen Choice Awards in Los Angeles. The "California Gurls" singer shared hosting duties with the male cast members of "Glee," using the show as an opportunity to go back to school.

Perry dressed up as a cheerleader, a prom queen, a goth, a hippie and a mouth-gear-wearing nerd. Perry ably handled hosting duties (and costume changes), as celebs such as Sandra Bullock, Taylor Lautner, Robert Pattinson and Megan Fox all took home awards.

Check out more photos of Katy's high school personality crisis, below.

Tags Glee, Katy Perry, Megan Fox, Robert Pattinson, Star Spotting, Taylor Lautner

(Photo: Getty Images)

If you're not a fan of martial-arts movies or Korean pop music (aka "K-pop"), you might have been scratching your head when some dude named Rain walked away with the golden popcorn for Biggest Badass Star (beating out ANGELINA JOLIE!) at the 2010 MTV Movie Awards. So for those of you unfamiliar with Rain, let us introduce you to one of Korea's most talented exports. For those of you who ARE familiar with Rain ... LET'S TALK ABOUT HOW AWESOME HE IS!

Over the past eight years, Rain has risen to superstar status in his native Korea, thanks to an über-successful singing, dancing, modeling and acting career. The illegally handsome Renaissance man got caught, however, in the U.S. hype machine last year when Megan Fox started singing his praises, describing him as "the Korean Justin Timberlake."

After a turn in "Speed Racer," as rookie racer Taejo Togokahn, Rain took on the lead role in "Ninja Assassin," which is about a jaded assassin who's looking to kick ass -- and take names -- during a plight to destroy his former mentor. His role in "Ninja Assassin" won him the Biggest Badass golden popcorn.

To experience Rain's badass-ness for yourself, check out "Ninja Assassin," out now. Listen to Rain's latest mini-album, Back To The Basic, listen to his hit "Hip Song," watch him accept his Movie Award and check out his 2006 video "How To Avoid The Sun." No passport required.

Related Content Is Rain Headed For The Small Screen?

Tags 2010 MTV Movie Awards, Justin Timberlake, Megan Fox, Rain

In what has to be one of the cutest viral/Internet sensation thingamabobs to come down the chimney in a minute, we're happy to throw some shine on Evan Taubenfeld's "Merry Swiftmas."

Taubenfeld is a former member of Avril Lavigne's band, and he recorded this genuinely sweet love-letter/Christmas wish -- complete with a pretty singalong chorus and references to Megan Fox, Scarlett Johansson and Kanye West -- as a tribute to his favorite country-pop gal, Taylor Swift. After Taylor heard the song, she tweeted about it, helping it become one of those web sensations we all live for.

Now Evan Taubenfeld has made a homey, lo-fi video for the song, featuring a cameo from Taylor herself. Enjoy the video below, and Merry Swiftmas/ Happy Taubmukkah to you all.

Tags Avril Lavigne, Evan Taubenfeld, Kanye West, Megan Fox, Scarlett Johansson, Taylor Swift, video

+ VH-1 reality star and Poison frontman Bret Michaels probably does NOT need to be reminded to "Open Up And Say... Ahh" for a Vicodin cocktail after getting pretty banged up at the Tony Awards last night. He suffered a broken nose and sundry other minor injuries when a piece of the set fell on top of him during the opening act. Get better, Bret! (MTV News)

+ Tons of stars like Rihanna, Adam Levine and his hot tattoos, Zac Efron (meh) and more turned out on Sunday, not just for the Tonys but for the Lakers vs. Magic game in L.A. (Neon Limelight)

+ A Jeff Buckley biopic may be in the works again, with James Franco among the brooding teen heartthrobs interested in the role. Franco is a dead ringer for Buckley, but can he sing?? (The Tripwire)

+ Possibly trying to make up for the debacle that was her Species-esque hairdo at the 2009 Movie Awards, Megan Fox moooooooore than redeemed herself at the premiere of the Transformers sequel in Japan. YOWZA! (Socialite Life)

+ Today's Twitter fight is brought to you by the picture of sobriety Lindsay Lohan and resident hottie Dr. Drew. (PopEater)

+ And speaking of sober sallies, Pete Doherty was holed up in a airplane restroom shooting smack like a pro. (Celebrity Smack)

Tags Adam Levine, Bret Michaels, Dr. Drew, James Franco, Jeff Buckley, Lindsay Lohan, Megan Fox, Pete Doherty, Rihanna, Zac Efron

+ More big news today from MTV Movie Awards winner Miley Cyrus, who announced an upcoming fall tour with her brother's band, Metro Station, AND the August launch of her joint-venture Wal-Mart fashion line with designer Max Azria. (MTV News)

+ Miley's also got a really hot co-star in an upcoming movie she's shooting. Boyfriend Justin Gaston better watch his back! (E! Online)

+ Check out this behind-the-scenes video from the set of Lady Gaga's latest single, "Paparazzi." (Popnography)

+ A little Megan Fox in GQ never hurt anyone. (Egotastic)

+ Christina Aguilera is going to bring us the future by way of her new album AND her jewelry collection. (Socialite LIfe)

+ Ozzy Osbourne likes to try on swimsuits without wearing underwear. Somehow we'd be more grossed out if it was KELLY Osbourne doing the trying on. (Star Magazine)

Tags Christina Aguilera, Justin Gaston, Kelly Osbourne, Lady Gaga, Max Azria, Megan Fox, Metro Station, Miley Cyrus, Ozzy Osbourne, Trace Cyrus, Wal-Mart

+ So the big moment that everyone is talking about today is from last night's MTV Movie Awards, when Brüno flew down in what looked like a feathered jock strap and nearly sat on Eminem's face. Let's just say Em didn't wait around to see Zac Efron win for Best Male Performance. (MTV Movie Awards)

+ P.S. Megan Fox doesn't really give a s*** what you thought about her hairdo at the Movie Awards. Suck her Tweet! (US Magazine)

+ Golden Popcorn winner and resident it-girl Miley Cyrus just renewed her Hannah Montana contract for a fourth season with Disney. GIrl ain't no fool! Make that money, honey. (Pop Crunch)

+ Joss Stone is willing to pony up millions of dollars to be let go from her recording contract with label EMI. Add her name to the list of bands or musicians who have left the label since 2007, including the Rolling Stones and Radiohead. (NME)

+ Shy crooner Susan Boyle came in second on Britain's Got Talent, then promptly checked herself into the hospital for going a little exhausted from all the media attention. Get better, Susie. (ICYDK)

+ P!nk slammed Kanye West recently for showing up to a Stella McCartney fashion show wearing fur and talking about how he wished designers used more fur (all while the VP of PETA was sitting in earshot). Whups? (Bossip)

Tags Bruno, Eminem, Joss-Stone, Kanye West, Megan Fox, Miley Cyrus, P!nk, Radiohead, Stella McCartney, Susan Boyle, The Rolling Stones, Zac Efron