Taylor Swift got to live out another dream last night, when she performed one of her hit songs with Beatles legend, Paul McCartney, at the Saturday Night Live 40th Annivesrary special’s after party.

Jimmy Fallon even joined them on stage singing along to Swift’s “Shake It Off.” Part of the moment was captured on Instagram by DJ Cassidy, who posted a clip of it.

The after party was held at New York’s Plaza Hotel and it reportedly went on to the wee morning hours.

Huffington Post reports the trio also performed The Beatles' "I Saw Her Standing There" with Dan Aykroyd.

Other performers during the after party included Prince, HAIM, Michael Bolton, Debbie Harry with Miley Cyrus and Ariana Grande on back-up vocals and more.

image via Instagram from DJ Cassidy

image via Roger Wong/INFphoto.com