Justin Timberlake & Jimmy Fallon Perform “History Of Rap”

Jimmy Fallon closed out his first week as the host of The Tonight Show with an awkwardly entertaining hip-hop twist. Joined by frequent rap collaborator Justin Timberlake and backed by house band The Roots, JT and Fallon LL Cool J's "I'm Bad," the Notorious B.I.G.’s “Big Poppa,” Kris Kross’ “Jump,” Jay Z’s “99 Problems,” Drake’s “Started From the Bottom,” and Kanye West’s “Good Life" and Run-DMC and Aerosmith’s “Walk This Way.”