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 Gigi Hadid and More Celebrities Embrace the Makeup-Free Selfie 90 Cute, Crazy, and Creepy Celebrity Halloween Costumes Life Was a Whole Lot Different in Hollywood During the Summer of 2005 This Amazing Makeup Artist Transformed Herself Into the Kardashians 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 Working Out Yoga Weight Loss Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.