Jillian Michaels is a personal trainer. She's risen to fame due to her role on NBC's The Biggest Loser. Michaels was born in Los Angeles...

Famed trainer Jillian Michaels covers the new issue of Shape Magazine, and inside, takes it all off, showing us that she's in really good ... well, Shape.

The fitness guru bares all in the July/August 2014 edition, posing nude and revealing her seriously toned body, which looks insane for 40 or any age:

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Fans weren't the only ones shocked by The Biggest Loser winner Rachel Frederickson's weight loss. Jillian Michaels herself was at a loss for words.

The personal trainer appeared flabbergasted by Frederickson's 155-pound weight loss (from 260 to 105) on the show's season 15 finale on Tuesday. When the 24-year-old former high school swimmer walked out onstage for the first time since leaving the ranch last fall ... this was Jill's reaction:

Posted in: Jillian Michaels

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.

Posted in: Jillian Michaels

Jillian Michaels Biography

Jillian Michaels Redbook Cover
Jillian Michaels is a personal trainer. She's risen to fame due to her role on NBC's The Biggest Loser. Michaels was born in Los Angeles... More »
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Jillian Michaels