The Gig: CEO, Roc Nation

WTF does Jay-Z not do?!? 50 million albums sold worldwide, 17 Grammys, an estimated net worth of $500 million, part owner of the Brooklyn Nets, a successful label with a tight roster (Jay Electronica, J. Cole, Wale and himself), a newly announced 2013 mega-tour with Justin Timberlake, a wife at the top of the pop game, a daughter who's also the youngest person to ever appear on a Billboard chart at less than a week old, a liquor brand (Dussé), co-ownership of the 40/40 Club... With all this and more under his belt, the only thing left for the "God MC" to do is walk on water and then turn it into wine, something with the kind of profit margin typical of a Jay-Z business venture. 

Also See: Hov's right-hand man in all things business, Jay Brownthe President of Roc Nation. Running Roc Nation, which has a joint venture with Live Nation, Jay Brown's hands are full as he juggles the label arm with artists (see above); the management arm (which includes Rihanna); and a partnership with  U.K. management company Three Six Zero who reps EDM acts Deadmau5 and Calvin Harris. With all these things seemingly happening at the same damn time, Brown makes sure that the Roc stays in every other building on the planet.