As if the Cannes Film Festival could get any more glamorous, this year's annual amfAR Gala went down in a flurry of swoon-worthy gowns and gorgeous ladies. There are times when a single star look really stands out, but this year's crop has us scratching our heads and wondering who's worthy of the top spot. With Jessica Chastain (in Saint Laurent) and Olivia Palermo (in Roberto Cavalli) both flashing a bit of skin and Stacy Keibler (in Zac Posen) rocking a classic shape, it's a close call — weigh in below!
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