Ziffren Brittenham
University of Pennsylvania Law School

WHY HE MATTERS He negotiated and oversaw Justin Timberlake's 134-show concert tour (which grossed more than $230 million) and structured the agreement for Jimmy Fallon and Timberlake to do the commercials launching Apple's iPhone 6. Not bad for a guy who began his career representing Mike Tyson after he bit off part of Evander Holyfield's ear.

HOW MANY SUITS DO YOU OWN? "Fewer every year. The most important person in the room is seldom wearing a suit."