POPSUGAR Fitness Guess Who Celebrity Fitness Guess Who Aug. 3 2010 Guess Who? by Fitness 8/02/10 0 Shares Like us on Facebook Can you guess which celeb trainer lent her services to a worthy cause? Source: Getty Read More Lou Gehrig's DiseaseALSCelebrity TrainerCelebrityGuess Who Celebrity Kourtney, Tori, and Ivanka Shared Some Cute Kiddo Snaps This Week! Gwyneth, Neil, and Rachel Shared Adorable Snaps of Their Kiddos This Week! You Have to See How Stunning Diane Kruger's Skin Is Without Makeup Will Smith and Jimmy Fallon Perform a Beatbox Throwback to "It Takes Two" Get fit with our daily newsletter Yoga Weight Loss Running Working Out Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR.