The Biggest Loser isn't simply returning with new episodes in January. It's bringing back an former favorite and focusing on an issue that plagues the nation.

That's right, Jillian Michaels - who exited the NBC competition in 2011 in order to focus on her new family - will once again be the head trainer next year, but this time she will be barking orders at a cast of 13-17-year olds, as The Biggest Loser tackles the issue of childhood obesity.

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