Billy Joel & Jimmy Fallon Use An iPad App To Form A Doo-Wop Group Live On The Tonight Show

Lenny Kravitz, Grace Jones, Lauryn Hill, Lion Babe, Thundercat, SZA & More Rock The Afropunk Festival 2015 in Brooklyn, NY.

Billy Joel joins host Jimmy Fallon in song on The Tonight Show with the help of the LoopyiPad app, which allows them to track out backing vocals and perform "The Lion Sleeps Tonight" live onstage as a doo-wop group. The two man, one tablet setup produces a phenomenal end product that is only made more amazing with the addition of Billy Joel's legendary falsetto. To be quite honest, Jimmy Fallon also puts his foot in their impromptu set with an impressive vocal performance. They, of course, get a little help on percussion from The Legendary Roots Crew. Check the footage below to watch the performance from Billy Joel and Jimmy Fallon. Stay tuned for more from The Tonight Show starring Jimmy Fallon.