Here’s a wonderful FEED article about the phenomenon of tunes getting stuck in your head. It contains fascinating facts about where memories are stored in the brain, and how remembering a tune in your head is more like singing than listening: “Imagining something, for the brain, is almost the same as really doing. All you subtract out are some low-level processes, in this case, the coordination of motion and breath. Your left brain might be activating representations of the words of the song and what they mean, while your right brain is calling up the tones, musical structure, and most likely your feelings and further associations — your whole brain lights up like a Christmas tree.” Tunes that, for better or worse (usually worse), stick like glue to my internal ears: anything by ABBA, the various themes from Star Wars, and the downright evil “Song That Doesn’t End”.