Has Lady Gaga been gone long enough to call this a comeback? Yes? Okay: Lady Gaga's comeback album-slash-artsperience ARTPOP will finally be available to the public on November 11. The album comes with a "reverse Warholian" app; the first single will be out on August 19; and Gaga is planning an "artRave" with Jeff Koons and Marina Abramovic, who sounds exactly right. Rejoice, monsters.