The Gig: Co-Founders/Co-CEOs, Cash Money Records Group

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Money and blood do mix for brothers Birdman (pictured above, right) and Slim (pictured above, left) who made their Cash Money label, founded in 1991, a billion-dollar independent that continues to dominate the charts and the rap market share. With over 500 million units sold globally, bolstered by their Young Money Entertainment imprint with a roster consisting of Lil Wayne, Drake, Nicki Minaj and DJ Khaled's We The Best group, the Williams' run looks like it won't ever stop, and in the music biz, that's some serious shit.

Also See: Their act-of-the-moment, Drake, whose crossover-hitmaking batting average has made YMCMB an unstoppable force in pop music. 

RELATED: 40 Things You Didn't Know About Lil Wayne