Serious Skin at amFAR: Kim's Legs, Janet's Boobs & Heidi's Whole Body!

There's something in the water in the South of France this year -- with more stars than ever flashing some flesh at amfAR's annual Cinema Against AIDS gala.

Kim Kardashian showed up solo to the event, stepping out on the white carpet in a bold yellow gown that had her "Jolie-ing" for the cameras. Singer Jessie J one-upped Kim, wearing a wild animal-print dress with a slit up to her hip!

Janet Jackson matched her dress to the carpet, wearing a pretty white number that brought serious attention to her cleavage.

But it was Heidi Klum who put them all to shame -- looking nude under a very sexy and very sheer "dress." Is single Heidi on the prowl?

Also at the fashionable event: Aishwarya Rai, Paris Hilton, Kate Upton, Milla Jovovich, Joshua Jackson, Diane Kruger, Tara Reid, Rose McGowan, Irina Shayk, Michelle Rodriguez and a fiery Kylie Minogue.

Check out all the hot fashion above -- who's your favorite?