‘Idol’s’ Ruben Studdard Will Battle the Bulge On ‘The Biggest Loser’ Ms. Bels Monday, July 1, 2013 The Script, Tune In It looks like “The Biggest Loser” producers are taping into the celebrity realm now. Ratings must not be up to par these days. Well, to help jump start the effort, season 2 “American Idol” winner Ruben Studdard is tapped to join the cast. For years, Ruben has struggled with weight issues. But, in the past few years he started a new health plan and became a vegetarian. Since becoming a vegan, he’s lost almost 70 pounds. However, since his divorce in 2012, he’s since gained a lot of the weight back. Hopefully, “The Biggest Loser” Season 15 helps put Ruben back on his weight loss journey.