Ruben Studdard is losing weight -- and adding songs to his repertoire these days.

As the second season "American Idol" champion prepares for tonight's (February 4) season finale of NBC's "The Biggest Loser," Studdard is rolling out his latest album, "Unconditional Love," a collection of classic love songs along with two originals -- including "Meant To Be," which has served as the theme song for "The Biggest Loser."

Studdard tells us that "Unconditional Love" in an outgrowth of his relationship with producer David Foster:

"I've been working with David Foster for the past, I'd say, five years, maybe since 2008, doing his Foster & Friends tour. And every since our first night on the road we kept saying we want to do a project together... It's really organic. It wasn't really like, 'We gotta do it right now' kind of thing. It was just real organic, man. But his word was we wouldn't do an album together unless we did classic love songs, 'cause he feels like that's exactly what people want to hear from me, and I believe he's correct, man. I think the album turned out beautifully."

"Unconditional Love" features songs made famous by Teddy Pendergrass, Paul McCartney & Wings, Bonnie Raitt and others, with Stevie Wonder joining Studdard on the Carpenters' "Close to You" and Lalah Hathaway guesting on "If This World Were Mine."

Hathaway will be touring with Studdard as well this spring, starting April 5 in Detroit. As for "The Biggest Loser," however, Studdard isn't betting on himself to win:

"I don't know, honestly. I'll just work hard and get to where I need to be, and whatever that is it is... I lost a lot of weight and been doing good."

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