Ear worm

There are times when I really wonder what kind of neurochemical bullshit goes on in my head to result in me having, for example, the "Lonely Goatherd" song from The Sound of Music stuck in my head all ... day ... long.

If you'll excuse me, I'm going to go bang my head repeatedly against something very hard until the damn yodelling stops. Wish me luck!

btw, here's a definition of ear worm, just in case you aren't familiar with the term: http://www.urbandictionary.com/define.php?term=ear+worm