Also Prism isn't on there. I guess any albums that sold under 2 million in 2014 couldn't make the top 10. Which is understandable why ST or Prism isn't on there. ST sold 2.3 million copies in 2013 and right now is sitting right beneath the 4 million mark, so she must have sold around 1.5 million in 2014. Katy must have sold around 1-1.3 million.