Michael Phelps has been called the greatest athlete of all time. Having won 16 Olympic medals, 48 career medals, World Swimmer of the Year in 2003, 2004, 2006, and 2007, and the hearts of people all over the world, we don't feel too bad drooling over the many available pictures of this stud with his shirt off. He's more than earned our respect as a (shirtless) American hero!

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