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Grandmaster Caz is a pioneer of hip hop in the late 1970s. He is known for his role in one of the biggest selling rap records of all time, Rappers Delight by the Sugarhill Gang. The song propelled the group to worldwide success, although Caz feels he was never given proper credit for his contribution. Today, at the age of 53 he's still making tracks, and even works as a celebrity tour guide in New York. (Getty Images)