The mega-star, Taylor Swift is continuing to pull in the $$$, relate to us with her song writing and surprise us with who joins her on stage. This time, in Foxboro, MA, she brings Carly Simon on to sing Carly's hit "You're So Vain". I think Taylor relates to the song because it's putting "someone" in their place. A feat she's done with her songs many times. They actually do very well together and Taylor asks Carly "who is THIS song about?"