Justin Timberlake And Jimmy Fallon's 'History Of Rap, Part 2'

On last night's Late Night, Jimmy and JT jumped out of their chairs to perform a sequel to their viral-y "History of Rap." In this second edition, songs ranged from OutKast's "Hey Ya!" and DJ Kool's "Let Me Clear My Throat" to DMX's "Up In Here" and Cyprus Hill's "Insane In The Membrane." » 7/20/11 1:37pm 7/20/11 1:37pm