Former "American Idol" winner Ruben Studdard is getting ready to star on yet another reality series - but this time, it won't be his vocal chords getting a workout. 

The 35-year-old, nicknamed "The Velvet Teddy Bear," will appear on the 15th season of NBC's hit reality series "The Biggest Loser," joining 14 other contestants vying to drop the pounds, regain their health, and win $250,000. Ruben, who has struggled over the years to keep his weight down, will start the show as the heaviest contestant - coming in at a whopping 462 pounds. 

"Because I’m fat as hell!" Studdard told when asked why he decided to join the show. "No, really though, they called and asked me to be a part of the show and I knew it was time for me to change my life. I’m 462 pounds. If anybody needs to be here, I do."

As you'll see in the preview video below, after he arrived at the "Biggest Loser" ranch, Studdard recived the news that he was on the verge of diabetes. 

"What’s crazy is that I actually had a physical in December and I was fine," he said. "This is why when people ask me what my turning point was why I wanted to lose weight, I say my age. ... I have high blood pressure now, and, six months into being 34 I get here and find out I’m borderline diabetic, which means if I keep going, by the time I’m 35, I could probably have Type II diabetes. So this was perfect timing for me."

Speaking with the media this week via phone, Studdard said this time on "The Biggest Loser" has been life-changing. 

"This show has given me a second chance to live a better life not just, you know, professionally but personally," he said. "It’s really given me an opportunity to put me first and not to put my career ahead of my health, and that’s what I've been doing for the past couple of years.

"I have to get up every day and give myself the two hours that I need to keep myself together before I even get into any music stuff, and that's just going to have to be how I do it," he added.

Check out the preview video below. "The Biggest Loser" premieres on Tuesday, October 8 at 8/7c.

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