Top 5 What Were They Thinking? Moments

Sometimes even the most glamorous celebrities suffer from tacky fashion faux pas. Here are our picks for 2006's most puzzling style blunders

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4. EVA MENDES

"I don't usually do updos," Eva Mendes told PEOPLE about her hair choice for the Costume Institute Gala she attended. And while playing it safe doesn't always pay off, this time Mendes should have stuck with what she knew. Plus, that high-collared dress is too costume-like for comfort. You're a guest at the ball, Eva, not an exhibit!