Jimmy Fallon has done an incredible job of keeping "The Tonight Show" atop everyone's mind since making the jump from "Late Night" last month.

He's got a ton of A-list celebrity friends that keep showing up, helping with him videos and bits that seem to go viral on a weekly basis.

In his latest example, Fallon had Billy Joel on as a guest and got him to help him with a performance of "The Lion Sleeps Tonight" from "The Lion King" movie.

With the help of an iPad app that loops vocals, Fallon and Joel nailed it, forming their own two-man doo-wop group.