Jimmy Fallon is well known for his outrageous antics on his Late Night program, especially when it comes to anything musical

John Krasinski famous from The Office was just on the show, and Jimmy didn’t waste any time getting to the fun stuff, challenging John to a lip sync battle.

In the game, the players take turns putting on their best lip sync performance of segments of famous pop songs. Just like in Who’s Line, there’s no actual point system. 

Highlights of the near 9 minute video include a perfect Katy Perry performance by Krasinski, and Fallon closing with an emotional, over the top Somewhere Over The Rainbow