Well "Global" not coming just from the #1 of singles. It's impact, tour, albums. You cant really take as terms numbers for a single or an album for the use of the word "global" cause even you're the biggest global force it's all about marketing, promotion..how you promote-sell your product..the Prism era yeap makes Katy more Global than gaga with ARTPOP era but in general Gaga is the answer. well an applause for katy cause she has-had awesome ways of marketing and promotion so well done katy! hopes for gaga find it again