Mischa Barton, Kirsten Dunst,  Eva Longoria Parker, Diane Kruger, Marion Cotillard

BENAROCH/SIPA, Francois Durand/Getty Images, Pascal Le Segretain/Getty Images, LOIC VENANCE/AFP/Getty Images, George Pimentel/FilmMagic

The Cannes Film Festival—aka 12 glorious days of movie-star glitz and glamour—just wrapped.

With so many dramatic gowns working their way down the Riviera's red carpet, there were bound to be some failures, natch.

From Mischa Barton to Marion Cotillard, we've compiled the hottest messes—which incidentally all happen to be black, white or black-and-white—that had us wondering what gives (en français, naturellement).

Tell us who you think is the biggest fashion offender this side of the South of France.

Worst of Cannes Style Poll
Which actress committed the biggest fashion faux pas?
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