This Week's Hottest Hair

Jessica Simpson, Jennifer Lopez and more prove that getting glam is all about the hair! Get inspired by this week's most stylish dos – then find your own best hairstyle. By Katherine Kluznik Rentmeester

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KATE BECKINSALE

Her super-thick locks are some of Hollywood's hottest – and she makes the most of them at the Nothing but the Truth screening in New York.

Try on your best hairstyle with InStyle.com's Hollywood Hair Makeover.