The real winner on last night's finale of "The Voice"? Christina Aguilera's stomach!
The singer returned to the show to perform "Feel This Moment" with Pitbull -- and she did it while baring her belly.
Aguilera looked great in a black skirt, sheer glittery top and pink bra, flaunting her recent weight loss as she belted out her latest hit.
Compare that with the shot of her from October 2012 below, and it's clear she's come a long way.
Check out her full performance of the song below.
Aguilera will return as a judge on "The Voice" in the fall.