Jillian Michaels and Bob Harper — longtime trainers on “The Biggest Loser" — appeared inseparable on screen, but behind the scenes their friendship fell apart.

It was a huge wakeup call for me." Jillian Michaels breaks her silence, comments on 'Biggest Loser' doc, co-star Bob Harper Season 7 competitor Joelle Gwynn, who got into an argument with Harper ...