WATCH: Adam Levine is hilarious singing ‘Oops I Did It Again’

As it turns out, Adam Levine only knows about half (or less) of the lyrics to Oops I Did It Again, but that didn't stop him from giving it his best shot in Jimmy Fallon's Tonight Show karaoke game. 

Adam, along with the other Voice US judges Blake Shelton, Pharrell and Gwen Stefani joined Jimmy for a few rounds of Spin the Microphone, which is practically Spin the Bottle with a lot of singing and less kissing.

The Maroon 5 singer was the first to be called on-stage, and with a good start, completely falls apart after, em… two verses.

Blake also belts out a very good version of YMCA, while Gwen gets down to Drake's new song Hotline Bling: