Shocking, indeed! Some celebs seek out extreme methods to shed pounds, while others transform with the aid of healthier methods. From Rosie O'Donnell's and Jordin Sparks' respective 50 pound weight losses to Biggest Loser winner Rachel Frederickson's whopping 155 lighter frame, see before and after pictures of celebrities' weight loss transformations.
Jordin Sparks 50 pounds
The "Tattoo" singer radiated confidence while showing off her 50 pounds weight loss at the 2012 Teen Choice Awards. "There is no secret," she told Us on the red carpet. "It's just eating better and working out! It's definitely a daily thing." She Idol winner told Us she got her sweat on with high-energy dance classes like Zumba, in addition to portion control. "I stop now when I'm full," she shared. "I love food and I love to eat. My thing was, do I really need seconds or do I want it just because it tastes good?"