Taylor Swift sings Calvin Harris' 'This Is What You Came For' at her only concert of 2016

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.”