New Jersey newlyweds got an unexpected gift at their wedding reception: a performance by Taylor Swift.

The superstar played a stripped down version of her song ‘Blank Space’ at Max Singer and Kenya Smith’s reception in Long Beach, California, on Saturday as amazed guests looked on and sang along.

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Swift agreed to attend after getting a letter in April from the groom’s sister.

She wrote about how her brother was a huge fan and how he and their ailing mother had danced to Swift’s song after the newlyweds were married in a hospital room.

Singer’s mother died shortly thereafter.

Swift had contacted Singer’s sister and they planned the surprise visit.

Swift also presented the couple a special card that stated: “So It’s Gonna Be Forever,” a lyric from ‘Blank Space’.

“Alright, I wanna talk about the fact that when I wrote this song I never in my life imagined I would be asked to play it at a wedding,” Swift told the crowd of the song, which is about Swift’s reputation for being a serial dater.

The 26-year-old singer, who recently split with her boyfriend of over a year, DJ Calvin Harris, also joked about her newly single status in an Instagram post.

‘Third wheel,’ she captioned a photo of herself posing with the bride and groom.

– with AAP

So Taylor swift showed up to my cousins wedding… 😳 #Surprised pic.twitter.com/98yDtmg7kH

— Gage Simmons (@Gage_Simmons) June 4, 2016

“When I wrote this song, I never thought I would be asked to play it at a wedding.” pic.twitter.com/F2n7nBeLCS

— Taylor Swift Updates (@TSwiftPR) June 5, 2016