Justin Timberlake stopped by 'Late Night With Jimmy Fallon,' on Fridy night, and luckily it wasn't just to talk about 'In Time.' Before the interview, the duo jumped into another edition of their excellent 'History of Rap' series and performed Part 3. It was just as awesome as the first two.

In a five-minute medley in which they were backed up awesomely by the Roots, Fallon and Timberlake cycled through a mostly '90s era of rap classics that included Coolio's Gangster's Paradise, the Fugees, Sir Mix-a-lot's 'I Like Big Butts,' the Beastie Boys, Outkast, and more. Check out the video after the jump.

Back in September 2010, Justin Timberlake and Jimmy Fallon collaborated on a brilliant look back at hip-hop with 'The History of Rap' on 'Late Night' (Weeknights, 12:37AM ET on NBC). If you thought lightning couldn't strike twice in the same place, you're wrong.

Timberlake was back, and they proved what was awesome once could be awesome again with 'The History of Rap, Part 2.' Featuring all new samples from across the hip-hop spectrum, we had as much fun going down memory lane as we did enjoying their performances.

What's crazy scary is how good both of them have proven to be at hip-hop. This time around they tackled songs like 'Push It,' 'It Takes Two,' 'Insane in the Membrane,' 'Hot in Herre,' In Da Club,' 'Hey Ya' and closed with a rousing audience singalong on Biz Markie's 'Just a Friend.'