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 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 Sofia Vergara and More Celebrities Embrace the Makeup-Free Selfie Find Out What Brand Landed Sarah Jessica Parker as the Star of Its New Ad Campaign Kourtney, Tori, and Ivanka Shared Some Cute Kiddo Snaps This Week! Gwyneth, Neil, and Rachel Shared Adorable Snaps of Their Kiddos This Week! 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 Weight Loss Running Working Out Yoga Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR.