Bristol Palin's new face: Plastic surgery or weight loss?

Yes, that's really her.

After her run on the last season of "Dancing With the Stars," Bristol Palin stayed out of the spotlight for a while, buying a home in Arizona and avoiding high-profile appearances. Recently, however, she's stepped out at the White House Correspondent's Dinner and a Candies gala to benefit teen pregnancy prevention... but she's almost unrecognizable.

While her face is strikingly different, she doesn't seem to have lost much weight elsewhere. The full-body photos below are from November 2010 and April 2011.

Palin was criticized -- mostly by late-night comedians -- during her "Dancing" run for being one of the only contestants not to lose weight during her time on the show. Kathy Griffin, who frequently cracks jokes about the Palin family, said at the VH1 Divas Support the Troops event, "She gained like 30 pounds a week, I swear to God, it was fantastic. She's like the white Precious."

What do you think? Is this the result of weight loss or plastic surgery?