Bristol Palin Bristol Palin

Bristol Palin admits her altered appearance is due to a surgical procedure — but not plastic surgery.

The Dancing with the Stars alum, who debuted her slimmer face at the White House Correspondents Dinner on April 30, tells Us Weekly that she underwent reconstructive jaw surgery in December for health-related reasons.

"Yes, it improved the way I look, but this surgery was necessary for medical reasons... so my jaw and teeth could properly realign. ... I don't obsess over my face," Palin says. Her face now has a more distinct jaw line and more pronounced cheekbones. In addition to her slimmed-down appearance up top, Palin recently lost 5 pounds.

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Though Palin is reaping the benefits of the surgery as though it were of the plastic variety ("I am absolutely thrilled with the results!" she reports), she says she wouldn't get actual plastic surgery "unless I got in an accident or something terrible and got disfigured."

What do you think of Bristol's new face?