Sir Mix-A-Lot mashed up in latest Brian Williams "Tonight Show" clip

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Brian Williams and the NBC News team was back at it on "The Tonight Show Starring Jimmy Fallon."

Monday night, the NBC Nightly News anchor was mashed up "singing" the Sir Mix-A-Lot hit "Baby Got Back." He got a little help on the female vocals from TODAY's Kathie Lee Gifford, Hoda Kotb and Savannah Guthrie.

The clip was the latest entry in a popular series of rap mash-ups featuring Williams.

The rap was the second major production of Monday's show, with the show's host taking a magical, Harry Potter-inspired train ride to Orlando, where he is hosting the show this week.