And 'The Biggest Loser' Isn't …

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SPOILER ALERT: This recap reveals the elimination results of this week's "Biggest Loser."

He was the season's biggest contestant, but Ruben Studdard won't be the season's biggest loser. The "Idol" alum fell below the dreaded red line during the weekly weigh-in on Tuesday's "Biggest Loser" ep, meaning he was sent home.

Studdard, who weighed 462 pounds when the competition began four weeks ago, lost a total of 39 pounds, and 8.44 percent of his body weight.

[Photos: Meet the Season 15 'Biggest Loser' Contestants

But his five-pound loss in the fourth week of competition left him with the lowest percentage of body weight lost for the week, and with his trainer, Dolvett Quince, having used his trainer's save last week, Ruben's time at "The Biggest Loser" ranch came to an end.

"It is an instant feeling of sadness, because I'm going to leave the friends I've made here on the ranch," said Studdard, who had maintained a positive attitude throughout the competition, even after being told in the second week that he was diabetic. "This experience is one of the toughest things I've ever been through. You know, I've been through two-a-day football practices, I've been through the 'American Idol' experience … I've been through a lot of mental and physically challenging experiences in my life, and this ranks right there at the top.

"I'm going to take everything I've learned away from here and try to live as healthy a life as I possibly can. It means the world to me to get a second chance. My goal coming to the 'Biggest Loser' ranch was to leave here a changed person, and I think I reached that goal. America, my voice may be soulful, but the next time you see me, my body will be sexy."

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The loss also means Studdard, the Season 2 winner on "American Idol," doesn't have the chance to become the first person to win two major reality TV competitions.

Meanwhile, contestant Jay Sheets, who had to eat several candy bars during the weekly challenge, also lost the most weight in pounds, with nine, bringing his total weight loss for four weeks to 53 pounds.

The episode also featured an update on Season 14 teen contestant Biingo Gray, who continues to trade time with his video games for lots of sports and other physical activities. The healthy habits Biingo learned on the show also helped his family; his mom and dad have lost more than 180 pounds together since Biingo was on the show.

"The Biggest Loser" airs Tuesdays at 9 p.m. on NBC.