Spencer Pratt Works Out To Heidi Montag’s New Video

Spencer Pratt tells UsMagazine.com he’s a huge fan of girlfriend Heidi Montag’s new ’80s-inspired music video, ‘Overdosin’. “What do you think I work out to every day? I know the whole thing by heart!” he said at the Pepsi 500 Running Wide Open Party in Hollywood on Wednesday. Montag added, “I wanted to do something fun with aerobics.”