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NEW YORK -- Jimmy Fallon is carving out a special niche in late night with his music videos.

On his debut Tonight Show on Monday, he shared a video he did with Will Smith on the Evolution of Hip-Hop Dancing.

On Tuesday, he and the Ragtime Gals did a barbershop quartet version of R. Kelly's Ignition (Remix).

On Wednesday, he offered up NBC News' Brian Williams and Lester Holt rapping the catchy old-school hip-hop track, Rapper's Delight, originally done by the Sugarhill Gang in 1979.

No, Williams and Holt weren't actually in the studio. Williams is in Sochi for the Olympic Games. It's a mash-up. And as Gawker notes, a "perfect cover" of the original.