As WWD's recent report of the best-and-worst selling issues of 2011 proved, celebrity covers sell magazines plain and simple. But while the report is a good indication of which celebrities we can expect to see more of on covers (Sarah Jessica Parker, Jennifer Aniston), and which ones we probably won't (Justin Bieber, Reese Witherspoon), it doesn't necessarily paint the whole picture. Because while the glossies are printed in the United States, many have dozens of worldwide editions which frequently use reprints (both covers and content) from their North American counterpart. So are the best-selling US celebrities consistent with those who showed up most around the world? The Kardashian appeal tends to dwindle when you take the overwhelming North American market out of the picture, so logic would indicate that cover giants Jennifer Aniston and Sarah Jessica Parker would pull out in front, right? Well, that's not always the case. We take a look at six big titles which have editions all around the world including Cosmopolitan, Elle, Glamour, Harper's Bazaar, InStyle, and Marie Claire, and who showed up the most where. The results might surprise you.