You've already seen Brian Williams' "Rapper's Delight" -- 10 million of you have! And you've checked out Williams' bad-ass "Gin and Juice" (eight million.) But, did you know that there were four other videos created by Jimmy Fallon's team, headed up by film research coordinator and producer John MacDonald?

MacDonald been making Williams mash-ups since mid-last year while Fallon was still working the evening shift over at Late Night. Before that he cut his teeth making videos for Saturday Night Live. His first foray into TV? In 1999 he appeared on a David Letterman segment -- "Stupid Human Tricks." MacDonald sang the alphabet with his mouth closed.

Six Videos of Brian Williams Gangsta Rapper

Snoop Dogg's verse from Dr. Dre's "Nuthin' but a 'G' Thang."
Air Date: June 5, 2013
Late Night with Jimmy Fallon

Warren G's "Regulate"
Air Date: June 6, 2013
Late Night with Jimmy Fallon

N.W.A's "Straight Outta Compton"
Air Date: June 7, 2013
Late Night with Jimmy Fallon

Marky Mark & Funky Bunch's "Good Vibrations"
Air Date: Jul 29, 2013
Late Night with Jimmy Fallon

"Rapper's Delight" w/Lester Holt
Air Date: Feb 19, 2014
The Tonight Show with Jimmy Fallon

Brian Williams Raps "Gin and Juice"
April 21, 2014
The Tonight Show with Jimmy Fallon

Bonus Videos:

Brian Williams appeared on April 21 to discuss his feelings about the videos. Quotable hilarity ensues...

Brian Williams Addresses His Rapping -- Part 1

Brian Williams Addresses His Rapping -- Part 2