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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JENNIFER CONNELLY

The star's sleek hair and center part make her face the focus for an appearance on The Late Show with David Letterman.

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