The first half of 2011 has been an exciting one—especially in the hair department. Hollywood's reigning blond bombshell Blake Lively took a walk over to the red side while Jennifer Aniston snipped her signature layers for a crisp, below-the-chin bob. Click "See the Photos" to reveal our six favorite star hair before-and-afters. And tell us in the comments below: Which new look do you think worked best?
AP Photo/Peter Kramer; 310pix.com; INFphoto.com; Brian Dowling/MTV/PictureGroup; Gilbert Flores /CelebrityPhoto; George Pimentel/WireImage