Taylor Swift and Carly Simon Sing “You’re So Vain” (Video)

Taylor Swift is out on her “Red” tour which stopped Saturday night in Massachusetts. At one point during her show she welcomes Carly Simon to the stage and the two sang Carly’s 1973 hit song “You’re So Vain”. They sounded great together and Carly looked and sounded awesome but as usual Taylor attempts her sexy dance. You can see it below