Fitness Fakes or Fitness Gurus?

Jillian Michaels 1 of 11

I have personally experienced Jillian Michaels workout DVDs, and know that she has the potential to kick your butt, no matter how fit you think you might be. Not to mention, she also helped people lose hundreds of pounds on 'The Biggest Loser,'- but do her results last? Critics have questioned her qualifications, and she's currently facing legal action for the weight loss products that she endorses.