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 > Follow us on Pinterest 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 The Most Outrageous Celebrity Costume Ideas For Halloween 10 Demi Lovato Costume Ideas That Will Make You Cool For Halloween You Have to See How Gorgeous Alessandra Ambrosio Is at Milan Fashion Week Eva Longoria Took Her Sister to Meet Pope Francis, and the Photos Are Too Sweet 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 Working Out Yoga Running Weight Loss Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.