Justin Timberlake and Jimmy Fallon team up once again for a third art of their hysterical "History of Rap" medley series. The two, backedby The Roots, tackled old school rap classics from Kris Kross' "Jump," LL Cool J's "Mama Said Knock You Out" to Kanye West's "Stronger" and Nicki Minaj's "Super Bass." Watch the comedic clip from the singer-turned-actor and late night television host above.