Star Style: This Week's Best Beauty Looks

The stars brave snow at Sundance, and the Hiltons are out! Here are our favorite hair and makeup moments from this week and the rest of the 2011 fall and winter season.

By Leah Melby

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Beauty Buddies

Every girl needs a front row friend! Cameron Diaz and Jessica Chastain chatted at a Paris couture show, likely discussing Hollywood and glossy hair, of course.

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