So they're a new duo signed to Interscope, made up of Cori Coraco and Brandi Cyrus (Miley's half-sister, if that means anything to you). They've just put up this song for free download on their soundcloud and it's one of the year's best songs. Katy's 'Teenage Dream' crossed with a The xx song - gorgeous guitars, delicate vocals, and great lyrics/melody. An EP is due out next month, with this serving as the lead single. Listen and download here!