Leighton Meester and Kate Middleton New Hairstyles

Fall 2012 may be the season of side-swept waves and faux bobs, but certain stars are switching up their hair length and color as the year comes to a close. While some have chosen shorter styles, others have gone from blonde to brunette (and vice versa). Here are 13 stars wearing 13 new looks: Which ones get your vote of approval?