POPSUGAR Fitness Guess Who Celebrity Fitness Guess Who Feb. 14 2010 Guess Who? by Fitness 2/14/10 0 Shares Like us on Facebook Sign up for our daily newsletter > Follow us on Pinterest Can you guess which Valentine's Day star spent his birthday working out at the gym? Image Source: INFphoto.com Read More Valentines Day MovieGuess Who 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 Running Yoga Weight Loss Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.