The Roots as Black Simon and Garfunkel, 2014.

Captain Kirk Douglas and Questlove of The Roots perform as Black Simon and Garfunkel on The Tonight Show Starring Jimmy Fallon on August 20, 2014.

Douglas Gorenstein/NBC

Black Simon & Garfunkel are back!

Jimmy Fallon brought out the renowned duo (which is really The Roots' Questlove and "Captain" Kirk Douglas) on Wednesday night for an angelic cover of Meghan Trainor’s “All About That Bass” on The Tonight Show. Check out the video below:

The track comes from Black Simon & Garfunkel’s box sex, which is awesomely just titled Box Set. This cover also features some lighthearted flashes of S&G’s “The Boxer” in the very end, after a run-through of Meghan Trainor’s surprising hit song.

In the past, Black Simon & Garfunkel have put their spin on tracks like Katy Perry’s “Roar” and Daft Punk’s “Get Lucky.”

Pop Shop Podcast: Meghan Trainor Talks 'All About That Bass'

“All About That Bass” -- the original, that is -- just surged to No. 2 on the Billboard Hot 100, trailing only MAGIC!’s “Rude” for the top spot.