That means Weight Watchers is left with Jessica Simpson, who has been making waves in the latest commercials showing off her post-baby body (check out Simpson's latest Weight Watchers commercial).
Having a hard time remembering Jennifer before the fame and slimdown? Take a look at her initial American Idol audition, here:
Inspired by Jennifer's weight loss? These other amazing celebrity transformations will surely inspire you to kick some butt in the gym:
23 Stars Who've Lost Weight and Kept It Off
'Dancing With the Stars': 20 Celeb Contestans Who've Slimmed Down
UP NEXT: Brooke Burke's Smart Diet Advice