While J-Law kept it classy, Katy Perry was happily wacky
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Best: Rooney Mara
Doesn't she look like Klaus Nomi (go ahead and Google if you need to)? Usually, that would be a fashion don't, but for a punk benefit? Nothing could be more appropriate. While I'm not entirely sure about the sandals, the dress is an arresting mash-up of hard zippers and soft detailing. Not as minimalist as some of her best outfits, but an interesting progression.