Taylor Swift and Carly Simon perform “You’re So Vain”

On July 27th, 2013, at the second of two sold-out shows in Gillette Stadium, Taylor gave the crowd a huge surprise – In front of more than 55,000 fans in Foxborough, Massachusetts, she introduced one of her heroes — Carly Simon. They performed Carly’s iconic (and ironic) hit song “You’re So Vain” together, delighting the crowd and creating a once in a lifetime moment for everyone in attendance.