POPSUGAR Fitness Guess Who Pictures of Celebs Working Out at the Muscle Milk Fitness Retreat Guess Who by Fitness 6/16/10 1 Shares Like us on Facebook Sign up for our daily newsletter > Guess which celeb showed off her guns while working out with trainer Jarett Del Bene . . . Image Source: WireImage Read More Muscle Milk Fitness RetreatJarett Del BeneBody BoxBoxingCelebrity Celebrity This Amazing Makeup Artist Transformed Herself Into the Kardashians Jane Fonda Proves That Age Is Just a Number Wedding Day Prep Just Got Easier With These Tips From Lauren Conrad Sofia Vergara and More Celebrities Embrace the Makeup-Free Selfie 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 fit with our daily newsletter Yoga Running Weight Loss Working Out Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR.