The Oscar After-Parties

Heidi Klum and Victoria Beckham

"It's very exciting to be able to come here and support Elton," said Victoria Beckham, who watched the ceremony at the annual Elton John AIDS Foundation viewing party, held at the Pacfic Design Center. "He's raised over $175 million dollars for this foundation. To be able to come here and help raise awareness and money? I'm honored." Beckham (in a dress from her own Victoria Beckham Collection) spent much of her evening with Heidi Klum, who wore Swarovski crystal-embellished Christian Louboutins. The two shared a table during the telecast and later parted ways with a hug at the valet stand as the night wound down.

-With reporting by David Hutchings, Scott Huver and Lindzi Scharf

Kristen Stewart and Julianne Moore

Julianne Moore

wore Calvin Klein Collection while she held court with with her Single Man director Tom Ford and co-star Colin Firth for most of the evening, but took a moment to chat with Kristen Stewart, in Monique Lhuillier, who did her best to keep a low profile at the Vanity Fair party.

Sandra Bullock

Sandra Bullock

's post-win plans? "I just want to sit down and take my shoes off," the actress said when she arrived at the Governor's Ball in Marchesa. "I want to eat and not worry that this dress will bust open!"

Carey Mulligan and Abbie Cornish

After an appearance at the Governor's Ball, Carey Mulligan made the rounds at the Vanity Fair bash, putting aside her fear of the Hollywood social scene to chat with the likes of Abbie Cornish and Best Director winner Kathryn Bigelow.

Cory Monteith and Lea Michele

Though they were served dinner during the ceremony at Elton John's soiree, Glee stars Cory Monteith and Lea Michele, in Oscar de la Renta, were among the celebrity guests who lined up for a late night snack at the In-N-Out burger station.

Jeff Bridges and Maggie Gyllenhaal

The Vanity Fair party was a family affair for Maggie Gyllenhaal, who chatted with her mother and frequently reached out to stroke the arm of her husband Peter Sarsgaard (who happened to be celebrating his birthday). Once Gyllenhaal spotted Crazy Heart co-star Jeff Bridges, she made a beeline for the Best Actor winner, who wore a Gucci tuxedo, wrapping him in a warm hug.

Cameron Diaz

Having changed gowns post-show, Cameron Diaz made a memorable entrance in a metallic Victoria Beckham dress at the Vanity Fair party held at the Sunset Tower Hotel. The diverse crowd-which included everyone from Hollywood legend Jane Fonda to tween pop idols the Jonas Brothers-enjoyed 70's disco hits from the Bee Gees and Diana Ross, played over the soundtrack, as donuts and cupcakes from Magnolia Bakery were passed through the room.

Mo'Nique

After getting plenty of practice at the Golden Globes and the Film Independent Spirit Awards, Mo'Nique (in Tadashi Shoji) got her acceptance speech right when she accepted the Best Supporting Actress Oscar. "Everything I wanted to say and everything I needed to say, I said it," the Precious star said at the Governor's Ball. "I feel good. I am a queen!"

Nicole Richie & More!

Once Joel Madden finished his award show DJing duties, he hit the white carpet at the Elton John AIDS Foundation party solo. After walking only a few feet, Madden heard a chorus of girls calling to him from inside the party. "Joel Madden! We love you!" screamed Miley Cyrus and Nicole Richie in unison. The girls giggled and clapped loudly and continued to call to him as he made his way inside.

Diane Kruger and Joshua Jackson

"I was so relaxed. Quentin [Tarantino] had a little pre-party at his house, so we all went over early and had champagne and pizza," said Diane Kruger of her Oscar Sunday. Though she started early, Kruger changed into a fiery Calvin Klein Collection dress and a vintage Jaeger-LeCoultre timepiece set with 225 diamonds to celebrate late into the night. She reconnecting with her Inglourious Basterds co-stars when she and boyfriend Joshua Jackson hit the Vanity Fair party.

Keith Britton and Zoe Saldana

Wearing a second Givenchy gown, Zoe Saldana and boyfriend Keith Britton celebrated Avatar's Oscar wins at the 20th Century Fox/Fox Searchlight Pictures after-party, held at Hollywood nightspot at Boulevard 3.

Meryl Streep and Amy Adams

Stars like Sandra Bullock, Stanley Tucci and Penelope Cruz were all on the hunt for Meryl Streep, who made time to catch up with her Julie and Julia co-star Amy Adams, who wore peep toe Christian Louboutins pumps, in a quiet corner at the Vanity Fair bash.

Jessica Simpson & More!

Jennifer Lopez

traded in her structured Armani Prive gown for a more after-party-friendly Gucci dress before accompanying husband Marc Anthony to the Vanity Fair party, where they posed with Jessica Simpson in Carolina Herrera.

The Jonas Brothers & More!

The Jonas Brothers

flew in from Houston to attend their first big Oscar party, the Vanity Fair soiree, where they posed for a group photo with Vanessa Hudgens and Zac Efron who wore a Calvin Klein Collection tuxedo. "This is probably one of my favorite dresses I've ever put on!" declared Hudgens of her plunging Jenny Packham gown. "There's nothing more appropriate than this dress for the Academy Awards."

Taylor Lautner and Emma Roberts

While Emma Robertstweeted from inside the Vanity Fair party, Twilight Saga star Taylor Lautner admitted he hasn't caught on to the trend. "I don't tweet, I'm not on MySpace and I'm not on Faceboook," the teen idol said. "I guess I'm just not that kind of guy."

Charlize Theron and Evan Lysacek

"Highlights of the Vanity Fair party...Vera [Farmiga] freestyle dancing and me talking to Sarah Silverman," tweeted Olympic Gold Medalist Evan Lysacek, who posed for a photo-op with Charlize Theron before calling it an early night. "Have to train early in am for [Dancing With The Stars]," he explained.

Gerard Butler and Barbara Streisand

Dressed in a Gucci tuxedo, ladies man Gerard Butler focused all his attention on a new woman: Barbra Streisand when they crossed paths at the Governor's Ball. The two talked for a long time while Streisand's husband James Brolin entertained the gathered crowd waiting for a word with the singing legend.

Hilary Swank & More!

"It's such a glamorous night, and you're really seeing people's dreams come true," said Mariska Hargitay who looked fittingly elegant in Vera Wang. The actress joined Hilary Swank, in a plunging, black Armani Prive gown at the Elton John AIDS Foundation party to congratulate the Tom Ford-clad co-host, Alec Baldwin, who wore Cole Haan oxfords throughout the show, on a job well done.

Kate Bosworth

Kate Bosworth

was in a festive mood at the Vanity Fair party, showing off her brightly colored Valentino gown for photographers.