Now this is a story all about how … that time Will Smith, the undisputed king of Instagram, wore a Glossier-pink sweater and rapped the Fresh Prince theme song with Jimmy Fallon. On The Tonight Show Thursday night, Smith and Fallon started out with the Golden Girls theme song, moved to the Jefferson’s theme song, eventually doing a Fresh Prince duet. The crowd rose to a standing ovation and sang along, because what else is there to do when Will Smith, Jimmy Fallon, and the Roots do the Fresh Prince?