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Teen Choice Awards Preview: Kaley Cuoco Hosts, 'Twilight' Battles 'Harry Potter,' 'Glee' Takes on 'Big Bang'

Taylor Lautner, Kristen Stewart and Robert Pattinson
Michael Buckner/Getty Images for Summit Entertainment
Taylor Lautner, Kristen Stewart and Robert Pattinson

Rachel Bilson, Lucy Hale and Kim Kardashian are set to appear at this year's ceremony.

The 2011 Teen Choice Awards are set to take place this Sunday. Here are some of the key battles and things to look out for when Hollywood's young film, music, television and sports stars descend on the red carpet at Los Angeles' Gibson Amiptheater.

Will Wizards Trump Vampires This Time Around?

The battle rages on between Twilight and Harry Potter again, but this time, it's for choice sci-fi/fantasy film. At the MTV Movie Awards earlier this year, the Twilight gang proved unstoppable, taking home night's top award, but will it be any different when the 13-19 year olds make their voice heard? Going by history, the Twilight franchise -- which received the most nominations on the film side with 12 for Eclipse -- looks to repeat again. (New Moon won the sci-fi/fantasy award, beating Harry Potter and the Half-Blood Prince.)

On the acting side, Twilight co-stars Taylor Lautner and Robert Pattinson will battle again for choice actor in a sci-fi/fantasy movie. (Remember, Lautner topped Pattinson last year to snag the coveted surfboard.) They'll have to topple Harry Potter's Daniel Radcliffe, while star Twilight star Kristen Stewart will be competing with Radcliffe's co-star Emma Watson for the title of choice actress in that genre.

With Harry Potter's decade-long franchise has officially done and Twilight releasing its final two Breaking Dawn films before closing the books, the feud between the two high-profile projects is all but over. (Next franchise possibly taking over? The Hunger Games.)

Other Worthy Battles

For choice vampire, it's come down to a three-way battle: Twilight (Nikki Reed, Pattinson) vs. True Blood (Alexander Skarsgard) vs. Vampire Diaries (Nina Dobrev, Paul Wesley, Ian Somerhalder).

In the choice romantic comedy, it's Emma Stone's Easy A competing against Katherine Heigl's Life as We Know It, Natalie Portman's No Strings Attached, Jennifer Aniston's Just Go With It and Kate Hudson's Something Borrowed.

Jersey Shore, which scored MTV's highest season premiere ratings ever, is a frontrunner in the choice reality show category, up against Khloe & Lamar, Koutney & Kim Take New York, Secret Millionaire and Real World.

The ABC Family dramas, Pretty Little Liars and Switched at Birth, may be taking each other out, competing in several of the awards show's summer categories: choice summer TV show, choice summer TV male star and choice summer TV female star.

Justin Bieber's stint on CSI got him a nomination in the choice TV villain category, where he'll be pit against Jane Lynch, Seth MacFarlane, Ed Westwick and Joseph Morgan.

Big Bang Theory on the Rise

The Teen Choice Awards went to CBS comedy The Big Bang Theory for its latest host: funnywoman Kaley Cuoco. Cuoco, who started her acting career at a very young age, is already a veteran at the young age of 26. She's starred in the ABC comedy 8 Simple Rules with Katey Sagal, James Garner, David Spade and the late John Ritter, among others. But Cuoco will have more than hosting duties on her more. Not only will she lead the awards ceremony, the CBS comedy will be competing against Fox's Glee for best TV comedy and Cuoco will have to fend off Disney Channel stars for the right to be called choice TV comedy actress.

Teen Favorites to Appear

The Teen Choice Awards wouldn't be complete without a slew of the youngest and hippest stars in the entertainment industry. Expect appearances by Lautner, Pattinson, Bieber, Cameron Diaz, Demi Lovato, Ellen DeGeneres, Tyra Banks, Jason Bateman, Rachel Bilson, Rebecca Black, Ashton Kutcher, Paul Wesley, Ashley Greene, Lucy Hale, Maggie Q, Shane West, Joel McHale, Zoe Saldana, Cat Deeley and Kim Kardashian, among others, during the show.

Taylor Swift will also receive a special award, the Ultimate Choice Award, during the ceremony -- the highest honor -- for her contributions to the entertainment industry. Past recipients have included Justin Timberlake, Reese Witherspoon and Sarah Michelle Gellar.

Musical performances by Lovato, Black Eyed Peas' will.i.am (serving as choice DJ), Jason Derulo, Selena Gomez & the Scene and OneRepublic will fire the crowd up.

The 2011 Teen Choice Awards air live Sunday on Fox at 8 p.m.