We've been taking a look back at the year's biggest headlines, cutest couples, and most exciting pictures with our Best of 2010 coverage, and now we want your help crowning the brightest smile of 2010. From leading ladies to supermodels, we love it when stars flash their pearly whites, but it's up to you to pick the winner. Check out the official rules, then get started playing our new best of faceoff game, and enter for a chance to win $500 — we're sure it'll put a smile on your face!
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