Jimmy Fallon has done very well for himself, making comedy out of his boyhood dreams. Last night he fulfilled his dream of singing in a trio with Billy Joel and a flat, magical future screen. Together, the three doo-wopped "The Lion Sleeps Tonight." Watch below. It's worth it just to see Fallon's grin when the idea actually pans out. Below that, watch Fallon sing backup and freak the hell out on "You May Be Right." One thing's for sure, at minimum, Jimmy Fallon sure loves Jimmy Fallon taking over The Tonight Show.