VIDEO: Justin Timberlake and Jimmy Fallon do 'History of Rap 4'

Justin Timberlake just wrapped up one hell of a week at 30 Rock. Last weekend he hosted Saturday Night Live for the fifth time with some help from a slew of big shots like Tom Hanks and Steve Martin. Then, JT and his new album were part of a week-long installment on Jimmy Fallon, which (of course) culminated in a fourth version of their "History of Rap" medley.

In case you missed it, watch JT and Fallon, with some help from The Roots, take us from Sugar Hill Gang's "Apache" to Macklemore's "Thrift Shop."