AUDIE CORNISH, HOST:
At NPR Music, they're wrapping up the year the best way they know how, with their hotly contested list of their 50 favorite albums of 2013. Now, all this week, we'll get a peak of that list from our in-house experts, including NPR Music writer and editor Stephen Thompson, whose beat is the ever amorphous indie pop, which - Stephen, what exactly is that these days?
STEPHEN THOMPSON, BYLINE: I have absolutely no idea. It used to mean accessible but unpopular.
CORNISH: OK. So...