Taylor Swift surprised fans in DC with a special guest performance by one of her many celebrity BFFs, Lorde, during her concert on Monday night.

The 25-year-old “Bad Blood” songstress brought the 18-year-old New Zealander (who flew 19 hours to be there) out on stage to perform her hit “Royals.” Lucky for you, the whole thing was captured on video by a fan:

As per usual, Lorde is perfection on stage, and the duet overall is pretty great. The fans, who belted out every word, also seemed to love it.

Throughout her “1989” tour, Swift has made sure to keep fans on their toes by surprising them with members of her enviable #squad. Stars like Nick Jonas, Martha Hunt, Gigi Hadid and even Uzo Aduba have appeared on stage with the “Style” singer.

But who will she bring out next?

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