"American Idol" winner RUBEN STUDDARD will compete on the upcoming season of "The Biggest Loser". This isn't his 1st attempt at losing weight, he did an intense diet and workout program with a personal trainer in 2006 . . . but it wasn't working for him. At the time, he said, quote, "I was losing weight, but I was exhausted. It was making me sick.
"I'm a big man. There was no way to do those workouts on that amount of food . . . so everything was contradicting itself."
He also became a vegetarian and dropped more than 80 pounds . . . after starting out at 455 pounds . . . but last year, he said that he'd gained almost all of it back while going through a divorce.
Ruben will be the first ever celebrity contestant on "The Biggest Loser". The upcoming season premieres on October 8th.