Christina Aguilera's American Music Awards looks from 2012 (left) and 2013 (right). Credit: Jason Merritt/Getty Images; Frazer Harrison/AMA2013/FilmMagic

She's a genie in a bottle, and at the 2013 American Music Awards, Christina Aguilera decided it was time to come on and let her new shape out. The pop diva took to the red carpet in a stunning white cutout gown, showing off her new svelte shape. 

The Voice coach has been impressing fans and critics alike with her trim frame this season on her hit NBC competition show, but seeing the weight loss at the AMAs was especially shocking when compared to her look from last year's show. 

Fresh off the release of her album Lotus, Xtina took to the 2012 AMAs in a lavender gown and a platinum blond bob wig. She received harsh criticism for the curve-loving look and even more for her eccentric performance of the dance anthem "Let There Be Love." 

This year she performed her indie smash "Say Something" with the duo A Great Big World in a simple black dress and minimal makeup, letting her weight loss shine without making her outfit over the top. 

Tell Us: What do you think of Christina Aguilera's 2013 American Music Awards look?