There are some songs I got quite bad memories off as well.
Take Gigi D'agustino - The Riddle as example. Only since a short time I have been listening to it again, before that, I didn't really want to listen to it. During a classmate's um... well, the song was played when we had a last look at him. He's no longer alive, you see.
Rihana - If It's Lovin' That You Want