WATCH: Justin Timberlake and Jimmy Fallons History of Rap: Part 2

Justin Timberlake is making the rounds this week promoting his new film with Mila Kunis, Friends With Benefits, and Tuesday night he appeared on "Late Night With Jimmy Fallon." Justin and Jimmy performed a sequel to their wildly popular "History Of Rap," which aired back when Justin was promoting The Social Network.

Check out the History Of Rap Part 2:

Watch the original History Of Rap: