Bristol Palin's New Face: Weight Loss or Plastic Surgery?

Something's different about Bristol Palin and we're not just talking about her hair color!

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Bristol showed up at the Candie's Foundation 2011 benefit gala at Cipriani in NYC on Tuesday looking almost unrecognizable!

If you take a close look (okay, doesn't have to be that close) Bristol's neck, jawline and cheekbones look a bit different.

Rumors of plastic surgery have already started, but an E! News source says that's not the case.

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Bristol is "not one to turn to plastic surgery," the source says.

"She just isn't that kind of person," the source adds. "I can tell you that she has lost a tremendous amount of weight since Dancing With the Stars and that is most likely the reason for speculation."

However, E! News also spoke with top plastic surgeon Dr. Brian Glatt, a board-certified New Jersey-based plastic surgeon with more than 12 years of expertise, who says, "She had a double chin before and that's gone now. It looks to me like she's had extensive liposuction throughout her neck, including under her chin, which has clearly been liposuctioned, it's obvious to me."

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And he also believes Bristol had lip injections done.

"Her lower lip looks a lot more full," he said. "It's pretty obvious to me that she's had something injected into her lower lip, nothing in her upper lip. If she had surgery recently, he lower lip could be swollen, but it looks injected, I don't think it's just from postoperative swelling, it's more prominent."