Concurrent with Underwood's crossover success was the debut of teen singer-songwriter Taylor Swift. Swift initially specialized in country-flavored coffee house songs such as "Tim McGraw" and "Teardrops on My Guitar," but as her success grew, she increasingly began moving her musical career toward pop. Beginning with "The Story of Us" in 2010, Swift started releasing some of her songs either primarily, or solely, as pop tunes. Many of the songs Swift recorded for the country and pop markets also achieved wide success (especially "We Are Never Ever Getting Back Together," which topped both charts), turning her into a leading example of a country crossover phenomenon, with various critics lauding her as the "next Shania Twain". A change to the "Billboard" methodology for compiling charts such as country charts directly benefited crossover artists such as Swift by taking into account airplay on non-country stations.