The 2010 MTV Movie Awards

Kristen Stewart, Scarlett Johansson and Jessica Biel were among the leading ladies of the big screen who celebrated the year's best flicks at the 2010 MTV Movie Awards, held at the Gibson Amphitheatre. While Stewart (in a gold brocade and tweed mini cocktail dress from Dolce & Gabbana) started the fashion parade on the red carpet, fans waited to see if this year would bring another Twilight Saga sweep-and if she and Robert Pattinson would give the audience another display of on onstage PDA.

-With reporting by Lindzi Scharf

Sandra Bullock accepted the MTV Generation award in a dazzling Spring 2010 Oday Shakar draped sequined dress and killer Louboutins. "I love what I do and I'm not going anywhere!" declared Bullock.

Scarlett Johansson was cocktail chic in a green lace and peep toe pumps by Dolce & Gabbana.

Lindsay Lohan channeled '70s glam in an ombre beaded halter jumpsuit from Pamella Roland's Spring 2010 collection.

A-Team star Jessica Biel looked demure in a dress by Giambattista Valli. Once inside, Biel and co-star Bradley Cooper presented the award for Best Kiss to Kristen Stewart and Robert Pattinson.

"MTV sent out a Tweet that said I'd be performing naked...but I'll be in Daisy Dukes and a bikini top," clarified Katy Perry, who walked the carpet in Zuhair Murad before heading inside to perform her summer hit, "California Gurls."

Before taking the stage to perform a single from her latest record, Bionic, Christina Aguilera braved the California heat to pose for photographers in her leg-baring Atelier Versace gown.

Knight and Day star Cameron Diaz was in full bloom in the "Laura" dress from Diane von Furstenberg's Fall 2010 collection.

"Everyone is here!" declared Nikki Reed (in Miu Miu) as she surveyed the action on the red carpet. "I'm a little nerdy, so I still get starstruck. Snoop Dogg just walked by!"

"I love seeing what everyone is wearing because I love fashion," said The City star Whitney Port, who chose a strapless Yigal Azrouel dress for the occasion.

She's up for several awards as a member of the Twilight Saga cast, but Anna Kendrick (in Zac Posen) scored the solo Best Breakout Star award for her performance in Up In The Air. "I'm definitely not cool enough to win an MTV Movie Awards," Kendrick gasped when she accepted her trophy.

Jennifer's Body star Amanda Seyfried picked up her Best Scared as S*!t award in a lace dress from Stella McCartney's Pre-Fall 2010 collection and Jimmy Choo sandals.

"I finally broke down and hired a stylist and it changed my life!" said Elizabeth Reaser, who was fashion-forward in a jumpsuit by Stella McCartney.

Vanessa Hudgens accessorized her Jenny Packham dress with Diego Dolcini gold peep-toe pumps.

Eva Mendes shimmered in a one-shoulder dress by Stella McCartney, house of Lavande jewelry and a clutch and shoes from Roger Vivier.

"I just wrapped the first season of my show and now I'm writing my first album," said Victorious star Victoria Justice (in BCBG).

"It's Missoni," said Nicky Hilton, who accessorized her summer ensemble with a casual side braid.

"I'm introducing Katy Perry," said Miranda Cosgrove, in a Versus Versace dress, Neil Lane jewelry and Louboutin heels. "I'm going to be running to my seat after, I don't want to miss her performance!"