Artpop is a studio album by American singer Lady Gaga. It was released on November 6, 2013, by Streamline and Interscope Records. Gaga began planning the project in 2011, shortly after the launch of her second effort, Born This Way. From Wikipedia
The pop icon addresses fan reactions to excluded albums, including 'Harlequin,' while preparing for her second Coachella performance and upcoming global tour.