If Taylor Swift stopped producing hits right now, at 23, she could tour a killer oldies show for the rest of her life. Her catalog is already jam-packed with acoustic gems ("Fifteen," "Mean"), country-pop relationship anthems ("Sparks Fly," "The Story of Us") and stadium-size epics ("I Knew You Were Trouble," "State of Grace"). Swift grew up obsessed with the Dixie Chicks on a Christmas tree farm in rural Pennsylvania; she started writing songs at 14 before moving to Tennessee. It didn't take her long to conquer the Nashville machine – or to break out of it. She's sold more than 25 million albums, recently dominating the pop charts with her dubstep smackdown "I Knew You Were Trouble" and the bubblegum stomper "We Are Never Ever Getting Back Together." No matter what she does musically, Swift has chronicled growing up and navigating tricky relationships better than anyone else in the 2000s. "I know general things about love," she told Rolling Stone last year. "How to treat people well, what you deserve and when to walk away. Other than that, love is a complete mystery – and that's why I like to write about it."