Taylor Swift, 26, took the stage at the Formula One U.S. Grand Prix race in Austin, Texas, on Saturday night to perform a song she's never sung in front of an audience.

>> Taylor Swift shares footage from Formula One rehearsals

Swift sang her version of "This Is What You Came For," which she co-wrote with ex-boyfriend Calvin Harris. Harris and Rihanna came together to sing the song this summer.

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“I’ve never played this song live before,” Swift, who was recovering from a cold, told her fans. “But if you know it, maybe you could sing along, and then I could get to know what that feels like to hear it sung back to me.”

>> PHOTOS: Taylor Swift through the years

It was her only concert of the year.

>> Click here or scroll down to see videos and photos from the performance

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Donald Trump's administration deployed the military to Washington, D.C., in the name of fighting crime, and in an Aug. 11 news conference he mentioned the possibility of military being sent to other large American cities, all of which are led by Black, Democratic mayors. And while Atlanta wasn't included in Trump's list, the city fits that profile under Mayor Andre Dickens. (Photo Illustration: Philip Robibero / AJC | Source: Getty)

Credit: Philip Robibero