This fall, "The Velvet Teddy Bear" is coming to the "The Biggest Loser."

Ruben Studdard, the 34-year-old who rocketed to fame as the winner of 2003's "American Idol," has announced that he will be joining the 15th season of reality weight loss competition.

The Grammy-nominated singer has struggled over the years to maintain a healthy weight, adopting a vegetarian diet in 2006 and a vegan diet in 2010 that he credited with helping him lose more than 100 pounds. 

"It was different, but I just wanted to do something completely different," he said in an interview. "I wanted to eat differently, and it’s really worked for me, brother."

Along with the other contestants, Studdard will be guided on his reality TV weight loss journey by "Biggest Loser" trainers Bob Harper, Dolvett Quince and the newly-returned Jillian Michaels. Taping for the fall program is already underway in Los Angeles, which is currently baking under its first heat wave of the summer

"I've never had an issue with my weight," Studdard told People. "[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." 

The 15th season of "The Biggest Loser" premieres Oct. 8. 

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Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Ruben Studdard to compete on 'The Biggest Loser'
Former 'American Idol' winner and Grammy-nominated performer is aiming to reclaim his health and drop the weight.