The clip led a post full of behind-the-scenes moments shared by the show, marking Season 51's final run of episodes.

The performances couldn’t realistically be described as McCartney at his peak, at least vocally speaking. His voice was softer, perhaps a bit unsteady, though the backing vocals buoyed him nicely. But his playing was still top-notch, and his stage ...

Will Ferrell may have reached elite Saturday Night Live alumni status as a six-time host tonight, but it was musical guest Paul McCartney who brought the house down and closed out the show - and Season 51 as a whole - with a surprise third performance.

McCartney completed the full circle, visiting the scene of the Beatles' historic TV performance in 1964.

Paul McCartney delighted fans when he performed three songs, one more than tradition calls for, during his musical 'SNL' appearance.