Marion Cotillard's mermaid-inspired gown was definitely a show stopper at the 2008 ceremony, when she also took home the Best Actress award. Some people weren't too crazy about it but I loved it. Her countryman, the king of avant-garde fashion, Jean Paul Gaultier, dreamed up this creation.
She's edgy and French so she can pull something like this off. The iridescent material used on the scalloped detailing was brilliant, and the light hit off of it just right. It was different and I liked that she didn't play it safe, even though it was her first time at the Oscars.