Singer/songwiter Taylor Swift perfoms onstage during the Formula 1 USGP on October 22, 2016 in Austin, Texas. Photo / Getty
Taylor Swift used her only full 2016 show to make a statement about her former boyfriend Calvin Harris, by singing the song she wrote for him.
The performer turned heads at the Formula 1 United States Grand Prix as she sang This Is What You Came For, which she wrote for Mr Harris under the pseudonym Nils Sjoberg whilst they were dating.
The hit was released in April, and featured vocals from Rihanna.
Ms Swift's last full concert was in December of last year, and fans waited many months to see her perform live again.
She played on Saturday night to a crowd 80,000 strong, singing her well-known hits as well as the Calvin Harris song.
After Ms Swift's representatives confirmed in July she had penned the song for Calvin Harris, the two had a very public feud.
The producer accused her of trying to "bury" him in a bid for publicity.
Mr Harris, who split with Swift shortly before she struck up a new relationship with actor Tom Hiddleston, said he was "hurt" by reports that the lyrics to one of his songs had been written by her.