Christina Aguilera – 50 Lbs – Clean Diet And Working Out
Despite the fact that Christina Aguilera used to sing “you are beautiful / no matter what they say,” she felt the need to work hard to lose a few pounds after appearing to be a little bigger… And she did it well! Her 50-pound weight loss is without a doubt one of the most astounding on our list. To make it on the small screen after a singing career packed with hit albums and sold-out concerts, Aguilera adhered to a strict diet and exercise regimen and returned to the greatest form of her life. The amazing American singer looks better than ever at 39!

Christina Aguilera – 50 Lbs – Clean Diet And Working Out
Kirstie Alley – 75 Lbs – Jenny Craig Diet Program
In an interview with Oprah, actress Kirstie Alley revealed that after a lifetime of being lean, she gained 40 pounds in one summer! It was the start of a battle against weight gain that continues to bother the mother of two. Alley has gone through several major weight-loss transformations in the last few years. However, the most impressive occurred between 2004 and 2007. He lost 75 pounds after joining the Jenny Craig diet regimen, a costly but scientifically proven program that may be followed for up to a decade.

Kirstie Alley – 75 Lbs – Jenny Craig Diet Program