Taylor Swift And Paul McCartney's "Shake It Off" Is The Duet You've Been Waiting For

    The collaboration we've been waiting for.

    Not content with collaborating with the cool kids Kanye West and Rihanna, Paul McCartney has now performed with the musician of the moment, Taylor Swift.

    And it's about time, since he's been practising his best "Shake It Off" dance moves for weeks.

    The pair got up on stage with Jimmy Fallon at the SNL 40th anniversary after party and performed "Shake It Off." Taylor posted this video of the performance on Instagram and it's amazing.

    There's also this one filmed slightly closer to the stage.

    However, it should be noted that in true Taylor fashion, her first attempt at sharing the video failed after she couldn't figure out how to rotate the video.

    Never change, Taylor.