Ruben Studdard – 119 Pounds – Diet & Exercise
Ruben Studdard, then-big, took the 2nd season of American Idol and was nominated for a Grammy Award that same year, even before his first studio album was released. He went vegan and lost an incredible 100 pounds, but he couldn’t keep it off. Studdard was cast on The Biggest Loser ten years later, and with a lot of hard work, he lost 129 pounds.
Christian Bale – 70 Pounds – near-starvation Diet
Christian Bale is as dedicated to his career as he is good at it, with his versatile roles having put his body through some dramatic changes. Bale gained about 190 pounds of muscle for his Reign of Fire in 2002, only to lose 70 pounds for his role in The Machinist in 2004. Then, for Batman Begins, he put his muscles back on and turned to cheeseburgers to gain 50 pounds for American Hustle. We wonder what the next role is going to put him through…