Style Watch PollWhat's Her Best Hair?

See the stars' latest cuts and color changes – and then vote on which hairstyle suits Cameron Diaz, Kim Kardashian and more

Credit: Giulio Marcocchi/Sipa; Joe Scarnici/WireImage

Updated: Wednesday Jan 04, 2012 | 01:30 PM EST By: Justine Harman

Shedding her teen queen image, Justin's gal lops inches off her lush mane, opting for a sophisticated and choppy bob.