Taylor Alison Swift is an American singer-songwriter and actress. Swift is known for narrative popular songs about her personal experiences especially her famous exes, and her duels with Kanye West. It has been said that Swift's defining quality as a songwriter is "a determination to register and hang onto fleeting feelings and impressions, a pre-emptive nostalgia for a present (and sometimes even a future) that she knows will some day be in the past." Rolling Stone described her as "a songwriting savant with an intuitive gift for verse-chorus-bridge architecture." Swift's tunes contains elements of popular songs music, pop rock and country.