POPSUGAR Fitness Jillian Michaels Guess Which American Idol Works Out to Trainer Jillian Michaels? Guess Who Said It? by Fitness 12/21/09 0 Shares Like us on Facebook Sign up for our daily newsletter > Follow us on Pinterest Which American Idol alumni credits trainer Jillian Michaels for keeping her fit? “I have Exercise TV on cable. Jillian Michaels’s videos will kick your butt. She’s my trainer, and she doesn’t even know it!” Image Source: Getty Read More Guess Who Said ItJillian MichaelsCelebrityAmerican Idol American Idol Kanye West Auditioned For American Idol, and — Spoiler Alert! — He's Going to Hollywood J Lo Flaunts Her Toned Legs in a Minidress While Promoting American Idol American Idol's 5 Biggest Success Stories of All Time J Lo, Pitbull, Prince Royce, and Ricky Martin Heat Up the American Idol Season Finale Jillian Michaels We Can't Wait to Check Out Jillian Michaels's New Reality Show Jillian Michaels Poses Nude at 40 — See Her Revealing Photo Shoot Survive the Holidays With Tips From Jillian Michaels Our 5 Favorite Fitness DVDs From 2013 POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Get Results With Our Fitness Newsletter Personalize Running Yoga Weight Loss Working Out Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.