Taylor Swift's Red Tour rolled into Massachusetts over the weekend, and she had something special for the audience up her black-and-white striped sleeve: a surprise guest appearance from New England pop legend Carly Simon.
You don't need a professional ear to realize that the uncredited background vocalist on Carly Simon's 1972 smash 'You're So Vain' belongs to Rolling Stones vocalist Mick Jagger.
When asked how the collaboration came out, Simon said, "He happened to call at the studio...