Singer Annie Lennox performs onstage during benefit.

... it's no wonder the 23-year-old, clad in a Dolce and Gabbana tuxedo, was such a hot item on the auction block. He was one of a slew of stars who attended the event. Guests ranged from Nobel prize winners to the fashion elite.

Actress Robin Wright Penn attended the dinner without husband Sean Penn, who recently dropped his petition for divorce for the second time.

Elizabeth Hurley chooses a pretty periwinkle frock.

French actress Eva Green makes some frightful makeup choices.

Actor Josh Hartnett also offered up his studly services in a celebrity lot - he offered to striptease for the highest bidder. But bids didn't get high enough for the hunk to drop his trousers.

Honored guest Bill Clinton mingles with amfAR Chairman Kenneth Cole.

Rapper 50 Cent stands out in a gray suit at the black tie event.

Paris also reconnected with her latest party pal, British socialite Peaches Geldof.

Sharon Stone cuddles with French actress Marion Cotillard...

Czech model Eva Herzigova's necklace is hard core.

Former president Bill Clinton's saxophone fetched €130,000 ($180,000).

Zoe Saldana makes a muted fashion statement at the charity dinner.

Paris Hilton has a little trouble with her diamond bracelet, but her beau, Doug Reinhardt, helps her retrieve it.

... and wraps her arms around Kruger.

Model Claudia Schiffer could do a pirouette in her ballerina gown.

German actress Diane Kruger nearly falls off a Chanel "Personal Transporter" while demonstrating the segway with her actor beau, Joshua Jackson.

Chinese actress Zhang Ziyi gets peachy.

Actor Emile Hirsch and Brianna Domont take in the picturesque surroundings.

French Vogue editor Carine Roitfeld embraces the trend of the moment - the thigh-high split...

... as does the night's host, Sharon Stone.

Actor Verne Troyer rolls into the event in style.

Dita Von Teese contemplates her effortless perfection.

Actress Kerry Washington strikes a pose on the event's red carpet.

Hayden Panettiere showed off her tan - after spending the week on a yacht with British TV personality Steve Jones - with David Furnish outside the Hotel du Cap. Proceeds from the Cinema Against AIDS 2009 dinner and auction go to American Foundation for AIDS Research (amfAR), a nonprofit organization that supports HIV/AIDS research.

Talk about some hot lips! British actor Robert Pattinson's puckers fetched $56,000 Thursday evening at an auction to benefit AIDS research. The auction's host, actress Sharon Stone, r, was shocked when two guests offered up $26,000 a piece to have the actor peck their daughters on the cheek. Click here to see photos from the red carpet at the Cannes Film Festival. But considering his film "Twilight" is the biggest thing for tweens since Jonathan Taylor Thomas...