Let the PSA battle begin.
To help out with NBC's charity event, Red Nose Day, Will Ferrell and Nick Offerman crashed The Voice for a very special episode for the best celebrity charity appeal contest.
Red Nose Day is a fundraising event that started in the U.K. 30 years ago and is making its debut in the U.S. for the first time on Thursday. The charity raises money to help children living in poverty.