Prince has done it again!

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Following appearances at the GRAMMYs and Golden Globes as well as a secret, Valentine’s Day concert in New York City, the artist graced the stage at Saturday Night Live‘s epic 40th anniversary after-party. And the crowd went crazy when he did an impromptu performance of “Let’s Go Crazy.”

Dude….this really really really really happened #O!!!!!!!!!! #SNL40 #SNL40afterparty

A video posted by Questlove Gomez (@questlove) on Feb 16, 2015 at 1:53am PST

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And then prince. With jimmy fallon Martin short and Chris rock. #snl40 A video posted by djcassidy (@djcassidy) on Feb 16, 2015 at 1:41am PST

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Prince was joined by Ariana Grande, Debbie Harry, HAIM, Miley Cyrus, Sir Paul McCartney, and Taylor Swift who all served as the most amazing house band ever, playing several songs throughout the evening.  Watch the video above to see all the star-studded action!

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McCartney and Swift performed a duet off “Shake It Off” while Cyrus, Grande and Harry reportedly formed a multi-generational power trio to sing Aretha Franklin’s “Respect.”

Shake it off with Taylor paul and jimmy. #snl40

A video posted by djcassidy (@djcassidy) on Feb 16, 2015 at 1:35am PST

//platform.instagram.com/en_US/embeds.jsAnd the SNL alum did not sit idly by. Chris Rock and Martin Short were dancing on stage while Jimmy Fallon joined in several songs. But none of them was more surprising (or epic) than Bill Murray on tambourine.

Bill Murray casually on tambo. #snl40 A video posted by djcassidy (@djcassidy) on Feb 16, 2015 at 1:36am PST

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