Yes, I know, another day, another 'must see' Jimmy Fallon video. But look, the guy just keeps bringing the goods! The presenter is barely a month in the new job on The Tonight Show, and there have already been enough best bits for an entire series.

Last night he had music legend Billy Joel on the show and decided to take advantage of the opportunity and fulfill his dream of singing with the music master. Using a voice-looping iPad app, the pair launched into a doo-wop version of The Lion Sleeps Tonight, and I'm telling you, if this doesn't bring a smile to your face, nothing will. Billy Joel is his usual awesome self, and that Jimmy isn't too shabby a singer either.

Watch this, get your doo-wop on, and start this sunny Friday as you mean to go on.