© Retna / Ruben Studdard 'American Idol' winner Ruben Studdard to compete on 'Biggest Loser' July 1, 2013, 5:03 PM EST By Tim Kenneally TheWrap Ruben Studdard won big on the second season of "American Idol." Now he's hoping to lose big on another television venture. Bing: Jillian Michaels returns to 'Biggest Loser' Studdard has been tapped to compete on the upcoming 15th season of NBC's weight-loss competition "The Biggest Loser," a network spokeswoman told TheWrap on Monday. The 34-year-old singer, who bears the nickname The Velvet Teddy Bear, has struggled with his weight throughout the years, though in 2006 Studdard dropped almost 100 pounds after seeking help from a weight-management center and becoming a vegetarian. Tell us on Facebook: How do you think he'll do on 'Biggest Loser'? Studdard's most recent album, "Letters from Birmingham," was released in March 2012. .