Washington [US], October 28 (ANI): Taylor Swift treated fans to a surprise performance with fellow pop star Sabrina Carpenter during her ‘Eras Tour’ stop in New Orleans on Saturday night, according to Billboard. Swift hinted she was about to do something special during her acoustic set, teasing, “It’s been stuck in my head,” as she prepared to sing a song by someone else. To the crowd’s excitement, Swift began strumming Carpenter’s hit song “Espresso” on her guitar. After performing a bit of the track, she playfully asked, “Is it OK if I call her, and you guys can say hi?” Swift then dialed Ca…