actually ARTPOP went to #1 a whole bunch of countries and it was #2 in the US something prism and bangerz didn't do, and it sold 65k in the US the last time i checked it's probably higher by now, once again it's doing poorly because it's been out for 2 months, because it only has one song it and no tracklist and she hasn't done promo in 3 weeks. it will start selling again once the second single comes out.