What's going on here: Well, this is a bit of an odd one, at least at first glance. It's neither recent nor broadly popular list.
Not much is known about Windows Phone demographics, but they likely wouldn't explain much. Since Windows Phone's music store is the Xbox Music Store, its largest customer base comes to it through consoles, not phones. Think of it this way: Android's ecosystem is based around the phone, Apple's is based around every platform (Phone, tablet, TV and iTunes for Mac and Windows), and Windows Phone's is based around the Xbox 360.
In light of the Xbox vote this list comes into focus: Imagine if the Billboard charts were determined by the buying habits of millions of young, male, Call of Duty-playing gamers. That's how an ancient Linkin Park album end up in the top 10.
Tomorrow: The platform's most popular apps!