Way to go Mike! Dr. Drew is Pro Guns"Celebrity Rehab" star Dr. Drew Pinsky appears to be hooked on working out. Who knew?!The 50-year-old doc (right) compared ripped biceps with his less endowed "Loveline" co-host Stryker (left) and ridiculously pumped "American Gladiator" Titan (center).Can you get addicted to protein shakes?http://www.tmz.com/2008/09/25/dr-drew-is-pro-guns/