Reading this list, I'm no longer sure what a "pop" is. It sometimes (especially when spelled out as "popular music") seems to mean "everything but classical," or "everything but classical and (most) jazz," in which case most everything on the thread counts, even things I'd have thought of as rather unlikely, like the B-52s or the Stones. Anyone have a definition? Sales is one possibility,as Tvad notes, but the we get things like Floyd's "Dark Side of the Moon," which seems a very different animal than, say, Madonna.
John
John