Not many people know that Will Smith and Jimmy Fallon's grandfathers were an NBC radio show duo back in the 1920s. In fact, they recorded their show in the very same studio where "Late Night With Jimmy Fallon" tapes today. What are the odds?
Even more curious, a lot of their old songs sound eerily familiar to Will Smith's later hits. Not that Jimmy is accusing Will of ripping off his late grandfather... not at all.
Take a look at Smith and Fallon's super old school clip above, and marvel at the off-screen endurance it took to pull this off.