Ryan Gosling Auctions a Kiss at amfAR's Big Event!

The annual amfAR benefit brought out well-dressed celebs like Michelle Williams, Jennifer Lopez and James Franco to pose on the red carpet and the star-studded fun continued inside. J Lo took the stage in her pink creation to entertain the crowd alongside Marc Anthony, with Michelle later stepping in front of the microphone and showing off her short dress. Ryan Gosling was the main attraction, though, as he auctioned off a kiss to a lucky lady, who was dressed as a man. Kate Beckinsale wore a sweeping updo as she addressed the audience, along with Marion Cotillard and Benicio Del Toro. Emily Blunt, whose fiancé, John Krasinski, is back in NY working on Something Borrowed, instead cuddled up to irresistible Ryan. The event's organiser Sharon Stone wasn't able to attend and instead delivered a video message, but her absence didn't get in the way of the night being a success—the bash raised $6.7 million for AIDS charities.

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Images include: Jennifer Lopez, Marc Anthony, Mary J. Blige, Elizabeth Banks, Kate Beckinsale, Ryan Gosling, Michelle Williams, Rachel Bilson, Ryan Kavanaugh, Russell Crowe, Marion Cotillard, Patti Smith