Jillian Michaels Returning to 'The Biggest Loser'

Jillian Michaels said Tuesday that she's returning to The Biggest Loser and announced that the show's new season will include teenage contestants to highlight the problem of childhood obesity.

Speaking during an appearance on the Today show, Michaels said she'd return to the NBC weight loss series that she launched along with trainer Bob Harper in 2004. The mother of two left the show in May 2011, saying she wanted to spend more time focusing on her children and charity activities. 

"The show has chosen to take on something very controversial," Michaels toldToday's Al Roker. "They're going to go after childhood obesity."

She said she just couldn't miss the opportunity to be part of the new season, which will put three teenagers on each team, although they won't be competing in the same way as the adult contestants. "For example, we won't be saying things to kids like, 'How much weight did you lose?' It's about getting them healthy, using words like 'healthy.'"

She added: "We won't be getting them on a scale -- it's about getting them on a softball team -- things like that. We're very cognizant of how touchy it is, how controversial it is."