William Adams, better known as will.i.am, has been able to stay on top of a fledgling music industry. A core member of The Black Eyed Peas, he, along with the other members of the group, have sold 31 million albums and 58 million singles. The hip-hop group's last tour, in 2010, reportedly netted them $48 million dollars.
However, it's not just music in which will.i.am has found success; he's struck gold several times—in investing, entrepreneurship and philanthropy.
On the entrepreneurial side, he was an early investor in Twitter and also found himself in another winning enterprise by becoming a founding shareholder of Beats Electronics. Apple has acquired the headphone and music-streaming company for $3 billion.