"Justin Timberlake Week" on 'Late Night With Jimmy Fallon' was pretty eventful, what with the coy shade JT threw at Kanye West, the barbershop quintet version of 'SexyBack' and all those mannequin arms flying about.

And on Friday, March 15, they closed out the whole thing in style by doing yet another installment in their epic 'History of Rap' series.

After some scripted banter between Justin and Jimmy about the last three ventures and whether they should tackle it a fourth time -- “We can’t,” “We couldn’t,” “We shouldn’t,” “We wouldn’t” -- they did, much to the delight of the studio audience.

Timberlake said it would be their last effort, but Fallon added, "Until the next time we do this."

And then they were off. The whole list of songs they included (in order) is below -- and you know, while we still think Tina Fey and Amy Poehler should host everything ever, we're starting to wonder why Fallon and Timberlake haven't been approached for awards show co-hosting duties themselves.

Sugarhill Gang – 'Apache (Jump On It)'
Grandmaster Melle Mel - 'White Lines (Don’t Do It)'
Kurtis Blow – 'Basketball'
Fat Boys – 'The Fat Boys'
Run DMC – 'It's Tricky'
Beastie Boys - 'No Sleep Till Brooklyn'
LL Cool J – 'Going Back to Cali'
Slick Rick – 'Children’s Story'
2 Live Crew - 'Me So Horny'
Public Enemy – 'Fight the Power'
A Tribe Called Quest – 'Scenario'
Cypress Hill – 'Hand on the Pump'
Wreckx-N-Effect – 'Rumpshaker'
Salt N Pepa – 'Shoop'
Snoop Doggy Dogg - 'Gin and Juice'
Busta Rhymes - 'Woo-Ha! Got You All In Check'
The Notorious B.I.G. – 'Hypnotize'
Missy Elliot - 'Get Ya Freak On'
Jay-Z – 'Izzo (H.O.V.A.)'
Nelly – 'Ride Wit Me'
50 Cent – 'P.I.M.P.'
Chamillionaire – 'Ridin Dirty' / Wiz Khalifa - 'Black and Yellow'
Trinidad James - 'All Gold Everything'
Macklemore and Ryan Lewis – 'Thrift Shop'
Eminem – 'Lose Yourself'