StyleWatchWhat's Her Best Hair?

See the stars' latest cuts and color changes – and then vote on which do suits Ashlee Simpson-Wentz, Reese Witherspoon and more. By Katherine Kluznik Rentmeester

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The new mom lightened up her hair from her pregnancy auburn, going back to her signature sunny hue.

Credit: Jon Kopaloff/FilmMagic; Chris Weeks/WireImage

Updated: Tuesday Jan 06, 2009 | 06:00 AM EST

Tuesday