What's the longest time you've been addicted to a song?

It's all happened, we get this one song stuck in our head and we mindlessly repeat it over and over in our mind while our brain cells slowly commit suicide one by one.

...Or maybe it isn't that bad? Maybe it wasn't Barbie Girl by Aqua you got stuck in your head for ages, maybe it was an epic song like Run by Snow Patrol?

Whatever the case, we have ALL had a song stuck in our heads at some point in our lifes. But just what was the longest time you've ever been addicted to a song...?