Hint: The philanthropic heavy-hitter grew up in a Christian household in New Jersey, but rebelled at 18 and went to New York City to play the keyboard in a rock band. After living the high life getting paid to party as a Manhattan nightclub promoter, in 2004 he says he realized how hollow his existence had become. Now the CEO of a fast-growing and tech-savvy charity, he's helped bring clean water to millions of people in developing countries.
