The two were taking a trip down memory lane.
Appearing on The Tonight Show with Jimmy Fallon last night, Will Smith and the beloved late-night television host engaged in a segment called "History of TV Theme Songs," which saw the two blend nearly a dozen classic tunes from beloved television series.
The four-minute medley saw Smith and Fallon, alongside some help from The Roots, began the segment with "Thank You for Being a Friend" from The Golden Girls, before belting out tunes from Martin, Full House, and Diff'rent Strokes. The two entertainers even performed theme songs from '70s comedies including Three's Company, The Jeffersons and Good Times.
However, the most exciting inclusion during this nostalgic mix was the theme song for The Fresh Prince of Bel-Air, which saw the duo ecstatically rapping along in utter joy. Peep this entertaining medley below:
The segment is a spin-off of another Tonight Show classic, "The History of Rap," featuring none other than Justin Timberlake. Fallon seems to always bring out Smith's musical chops, as the two famously covered Rob Base & DJ E-Z Rock's timeless hit "It Takes Two" primarily using an iPad beatbox app.