Say buhbye to the Velvet Teddy Bear -- American Idol Season 2 winner Ruben Studdard is CONFIRMED to be joining the next season of The Biggest Loser, which will be out in fall.

Ruben doesn't want you to get it twisted though -- he doesn't have a problem with his weight, but he said his family has a huge history of high-blood pressure, diabetes, and heart-related issues, so he doesn't want to have to worry about it when he's 40.

High-five to the (soon-to-be not-so) big guy for putting his health first! (Now excuse me while I eat some Ding Dongs.)