Will Smith + Jimmy Fallon in a sing-along =

This Tonight Show segment just took “Flashback Friday” to the next-level. And these two buddies may have inadvertently created a new sitcom in a matter of minutes by simply singing together:

Perfect Friends.

Thankfully, Will Smith and Jimmy Fallon aren’t strangers. If they were, the “History of TV Theme Songs” would have never happened.

But they are friends, pals, and even a confidant when needed.