Justin Timberlake's "Sexy Back" might as well have been the anthem for this crew of sultry Cannes sirens. With plunging necklines, thigh-high slits, cutouts, and, yes, sexy backs, these women turned heads at every film premiere and party they attended. It may come as no surprise that the supermodels in attendance delivered the most jaw-dropping cuts - just look to Karolina Kurkova in a cutout Roberto Cavalli gown for the proof - but we'll bet you didn't expect to see Olivia Palermo bare so much skin. For this year's sexiest set at Cannes, just keep clicking.