Your body! The pop diva showed off her noticeably slimmer figure and estimated 20 pound weight loss at the season-four premiere screening of The Voice in March 2013. Aguilera whipped her body back into prime form by working out with fitness guru Tee Sorge and practicing yoga. "It's more of a mind-body thing for her," a source revealed to Us. "She believes in exercise that she enjoys, doing strength work as opposed to intense cardio."

The Weight Watchers spokeswoman dropped more than 80 pounds after she teamed up with the program in 2010 through November 2012. "I'm at the weight I want to be," the Chicago native told Redbook magazine in December 2012. "I got used to being plus-sized and knowing how to be that," she continued. "I keep thinking that I probably need an extra-large or a large and the stylist is like, 'No, you need a medium or a small.'"