Welcome to the Glitter Ball! The glam-setters and young stars were all out in force Sunday night at the Gibson Amphitheatre in starry Universal City bedazzling in their most elegant and stylish outfits for the 2009 Teen Choice Awards hosted by the Jonas Brothers.

Gossip Girl actress Leighton Meester looked fun and flirty in her silk nautical Louis Vuitton dress. She completed her look with red Brian Atwood platform pumps.

Cameron Diaz attended the event in a grey Alexander McQueen pencil dress with zip detailing on the bust and a pair of electric blue pumps.

Fergie opted for a multi-colored Marc Jacobs sequined dress and a huge silver cuff.

Kim Kardashian stepped out in a white Stella McCartney origami pleated dress.

Twilight actress Kristen Stewart looked rock chic in a Rock & Republic metal mini dress.

Selena Gomez channeled a Grecian goddess wearing a one-shouldered lavender dress and silver t-strap pumps.

Twilight actress Ashley Greene walked the red carpet in a strapless  Dolce & Gabbana floral frock and fuchsia sandals. She accessorized with metallic purple clutch.

Miley Cyrus aka Hanna Montana finally chose something youthful-looking, wearing a white Hanes tank and Haute Hippie  mini skirt. Tons of chains added a rock’n’roll touch to her oeuvre.

Kristen Bell donned one of this season’s hottest trends –the  jumpsuit. She arrived wearing a black Topshop number along with an olive colored clutch and gold sandals.

Britney Spears wore a dazzling little black dress and completed her ensemble with a pair of uninspiring black shoes.

Post Grad star Alexis Bledel glowed in a cobalt blue Opening Ceremony dress with lace detailing. She complemented her look with vibrant orange Loeffler Randall Genevieve sandals.

Megan Fox wore a printed strapless dress with a pair of black heels.

Audrina Patridge wowed in a raspberry Zuhair Murad ruched dress. She carried a purple clutch and chose some delicious Courtney Crawford  aqua blue pumps.

Vanessa Hudgens donned a purple Christian Dior pleated dress with a sheer deep v-neck, suede pumps and a black clutch.

Hayden Panettiere red-carpeted in a light pink Zac Posen ruched dress and matching heels.

Ashley Tisdale wore a strapless number with Christian Louboutin studded pumps.

Rumer Willis shined in a dazzling little black dress.

Amanda Bynes showed off her curves in a lemon body-con Herve Leger dress.

Emma Roberts arrived wearing a white Monique Lhuillier mini dress with embellished details on the top. She accessorized with a pair of tough black booties.