For a couple of months leading up to Christmas, we're all infected with earworms: catchy holiday tunes that we can't get out of our heads.

James Kellaris, marketing professor in the Carl H. Lindner College of Business whose research is based on the earworm phenomenon, is quoted in a December 19, 2012 Forbes Magazine article as to why this occurs and offers a top 10 list of common earworm songs.