Jimmy Fallon and Justin Timberlake Perform the History of Rap 4 [VIDEO]

Justin Timberlake has had quite a week. After an explosive performance and hosting gig  on 'Saturday Night Live', Timberlake made the trip over the 'Late Night with Jimmy Fallon'. They decided that for the fourth time, they would perform the History of Rap. It take syou from the 70s all the way through today. Check it out!