What Billy Joel and Jimmy Fallon Do Together is AWESOME! You’ll Want Your Speakers On For This! Subscribe to Reshareworthy! It's FREE and always will be! Using an I-Pad app, Jimmy Fallon and Billy Joel form their own two-man doo-wop group, singing “The Lion Sleeps Tonight” in four-part harmony. This made me smile so much! Share this with your friends who love music!