Jordin Sparks – Diet & Exercise / 50 pounds
It seems like American Idol has a lot of contestants who decided to change their image through the course of time. In 2007, Jordin Sparks won the competition at 17 years old, proving that she is truly gifted. After six years, the daughter of one of NFL’s biggest stars, Philippi Sparks, decided that she wanted to lose weight. By adopting a strict diet and hitting the gym five times a week, she managed to let go of 50 pounds, and she now looks gorgeous.