Any Choral Earworms Out There?

Almost everyone has experienced the phenomenon of the "earworm," a tune that gets stuck in your head that you just can't shake out. In fact, it happens to 90% of people at least once per week. Researchers at Goldsmiths, University of London are collecting these songs and bits of melody in hopes of learning more about the way human memory works. Listen to the NPR story here and let us know what your earworms are. Any choral musical moments among them?