Jillian Michaels, who served as a fitness trainer on the NBC reality series The Biggest Loser from 2004 to 2011, has ...

Jillian Michaels didn't get along with every contestant on "The Biggest Loser" ... but, that doesn't mean she was handing out ...

In 2004, NBC premiered a reality show unlike anything anyone had ever seen and one that would forever impact pop culture.