Sarah Silverman, Amanda Peet, Anna Wintour, Bon Jovi, Chace Crawford, Christian Slater, Claire Danes, Clive Owen, Dita Von Teese, Emmy Rossum, Eva Mendes, Hilary Duff, Jerry Seinfeld, Lake Bell, Mary J. Blige, Michelle Monaghan, Mischa Barton, Molly Sims, and Sarah Michelle Gellar were all in attendance at the Gala last night.

Any favorites??

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Ben Affleck, Garth Brooks, Reese Witherspoon, and Eva Mendes have joined forces to urge Americans to vote in a new TV ad.

Cameras catch the quartet going about their normal lives while each talks about the importance of voting in the new DividedWeFail.org public service commercials.

Country star Brooks changes a lightbulb, Mendes enjoys a coffee, Witherspoon spends time shoe shopping and Affleck plays with daughter Violet’s dolls house.

Calvin Klein Underwear will kick off a worldwide advertising campaign with a sexy new face and voluptuous figure: Eva Mendes.

The deal deepens the brand’s involvement with Mendes, who already has been named as the face of Calvin Klein’s upcoming fragrance, the name of which has not been revealed.

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She seriously has the most perfect legs.

Splash

Eva Mendes looked in high spirits as she entered a medical center in Beverly Hills, yesterday.

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Eva Mendes has temporarily checked out of the Cirque Lodge, where she was being treated for “personal issues.”

Her rep tells Usmagazine.com, “Eva is attending to some personal business in Los Angeles and intends to return to complete her treatment shortly.”

Several weeks ago Mendes quietly admitted herself into the Utah treatment center, where Lindsay Lohan and Mary-Kate Olsen have also stayed.

Mendes was struggling with a well-hidden substance abuse problem, including cocaine use, sources close to the actress tell Us Weekly in its latest issue.

“She kept it all behind closed doors and wasn’t really a mess in public,” an insider told Us.

The pressures of Tinsletown – Kirsten Dunst has also reportedly checked into rehab – fueled the fire: she fell into a hard partying crowd at the Hollywood club now known as Teddy’s, where her longtime boyfriend, producer George Augusto, used to DJ.

“She has a lot of low self-esteem and body issues,” said a pal.

Another insider said, “For a lot of girls in Hollywood, cocaine makes them feel more confident and stay skinny.”

But Mendes, who just wrapped 2009 action flick The Spirit (co-starring Scarlett Johansson) and told Us last fall that she wanted “to be known for her work,” knew she needed to get well to improve professionally.

“She pulled away from that crowd last year to focus on her career,” says a source, adding that treatment was a vital step to recovery. “She wants to be healthy.”

Debra Messing, Mendes’ co-star in upcoming drama The Women, tells Us: “I have no doubt that like everything else Eva puts her mind to, she will get through this challenging time. I send my love to her.”