4 months?!
4 DAYS and I'd be around the bend. If it's one that I don't like. Heck, 4 HOURS and I'd be good and ticked off over it.
That said, there is always a song going in my head (even if I wake up in the middle of the night, there's something playing), and there are a lot of the same ones, but they are ones I love and that doesn't bother me in the least.