Taylor performs Calvin’s song

Just months after breaking up with Calvin Harris — and a whirlwind romance with Tom Hiddleston — Taylor Swift sent out mixed signals at a concert on Saturday night, when she played one of the English DJ’s hit songs.

Performing at the Formula 1 Grand Prix in Austin, Texas, Taylor sang an acoustic cover of This Is What You Came For, a song that triggered an online spat between her and Calvin, TMZ.com reported. She had written the song for him under the alias Nils Sjoberg.

The two dated for over a year, ending their relationship abruptly in May this year. Less than a month later, Taylor began seeing actor Tom Hiddleston, but broke up with him too, after a couple of months.