Young Guru
Gimel "Young Guru" Keaton mixed and recorded The Blueprint 2, which is no surprise: He's done the same on all of Jay's albums except for his debut, Reasonable Doubt. He mixed the third installment of The Blueprint in 2009 and worked on Young Jeezy's TM103: Hustlaz Ambition and Rick Ross' Teflon Don in the years to follow. In 2010, he became Jay-Z's official tour DJ as well.
(Photo: RocNation)