Justin Timberlake And Jimmy Fallon Do ‘History Of Rap 3′ [Video]

Justin Timberlake was a guest on Jimmy Fallon's show Friday night, and everyone wondered if they would bring back the popular 'History Of Rap' performance for a third go.

The answer was made clear very quickly.  Jimmy didn't even introduce JT, he just launched into some RunDMC.

Check out the first two editions here and the whole performance from the show below.