Who could forget the first time Justin Timberlake shared the stage with Jimmy Fallon on late night TV for The History Of Rap Part 1 back in September. To refresh your memory, you can watch it here. It was an awesome medley of rap songs from the 80's to present day and it blew everyone away. Thankfully, Justin and Jimmy have reprised their role as hip-hop educators to bring us the Part 2 of this awesome collabo. Now the only question that remains is: when is Justin's next album coming out?!