Justin Timberlake, Jimmy Fallon and the Roots 'Take It There' on Late Night

Late Night With Jimmy Fallon brings back the "hipster" and classic rap music.

The Roots "come alive" on Jimmy Fallon.

Justin Timberlake was a guest on Late Night With Jimmy Fallon, promoting his film The Social Network, when he and Fallon broke out into a rap medley. The only thing funnier than Fallon asking if the Roots know "some Sugar Hill Gang" is how Fallon and Timberlake kick it on a number of "old skool" classics. Norman Mailer's "White Negro" is far from dead. Check out the video below: