Bristol PalinAlthough Bristol Palin previously denied that surgery had anything to do with her drastically altered visage, now she's singing a different tune, admitting that she did, in fact, go through a procedure that gave her a sleek new jaw.

"I had corrective jaw surgery," Palin told Us Weekly. "Yes, it improved the way I look, but this surgery was necessary for medical reasons ... so my jaw and my teeth could properly realign ... I don't obsess over my face."

Palin admits that she had the surgery in December 2010, after her successful run on 'Dancing with the Stars.' And apparently a 'misaligned jaw' was a godsend for Palin who is 'thrilled' with her new look.