(CNN) Taylor Swift gave a surprise performance Friday night at the Stonewall Inn and wished the crowd at the site of the LGBTQ rights landmark a happy Pride Month.

"I was totally shocked because it's such a small space. Everyone went crazy!" said Kyle Luker, who shot video of the Grammy-winning singer playing "Shake It Off."

He'd been at the club for about 90 minutes when Swift came on stage.

Actor Jesse Tyler Ferguson emceed the event and joined Swift on stage to dance and sing along.

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