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Hollywood's loveliest ladies were strutting their stuff at the Costume Institute Gala last night, but some of them missed the mark. While we love weighing in on everyone's looks, some of them are definite fashion disasters! What do you think - who was the worst dressed last night?
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15 Natalie Portman and Dakota Fanning Team Up For a Fashion Week Front Row
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16 Sienna Miller Shows Her Baby Bump in a Tight Black Dress
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20 Jennifer Lawrence Goes For a Stroll With Her Valentine Nicholas Hoult
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22 Scarlett Johansson Wears a Bikini For a V-Day Cruise With Nate Naylor
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24 Jennifer Lopez Stops by The Tonight Show to Chat Idol, Her Coconuts, and Valentine's Day
