Ruben Studdard is hoping to go from winning big to losing big.

The second-season American Idol winner will face his weight issues head on, as he will compete on The Biggest Loser's upcoming fifteenth season on NBC, People reported.

Studdard has unsuccessfully attempted to battle his weight several times since he won American Idol in 2003, beating out runner-up Clay Aiken.  In 2006, he attempted a special low-calorie diet and strict exercise regimen but discovered the combination wasn't the healthiest way to shed pounds.

"I was losing weight, but I was exhausted. It was making me sick," the 35-year-old singer told People. "I'm a big man. There was no way to do those workouts on that amount of food, so everything was contradicting itself."

Studdard reportedly ditched that method and became a vegetarian that same year, resulting in a 70-pound weight-loss from his 455-pound starting point.

"I've never had an issue with my weight," Studdard said. "[But] my family has a history of high blood pressure, diabetes, heart-related issues -- things I didn't have to deal with yet because I'm young. But I don't want to be worried at 40, and if I don't fix things now, I will be."

Studdard reportedly lived a healthy lifestyle while married to ex-wife Surata Zuri McCants, however, he fell off the wagon following their 2012 divorce.

The Biggest Loser's new season will premiere on Tuesday, October 8 at 8PM ET/PT.