Hair changes have abounded in Hollywood over the past couple weeks with Selma Blair trading her short do for long locks, brown-haired Lily Allen lightening up — and even iconic California-blonde Kate Hudson feeling blue. And now we can add Rachel Bilson to the list of hair-swapping celebs. We spotted the star on the set of her new film New York, I Love You in this shoulder-length blond bob that’s a decided departure from her usual darker look. And even though it’s probably just a wig, we love seeing such a drastic change! Who knew Rachel would look so good as a blonde? Tell us: Do you think Rachel should go blonde for real? Or should she stick with her natural color?