The title is a line of a Francine Jarry/Abraham-Hicks song.
Songs affect me too (surprise!) emotionally, and yes, it has a lot to do with the history of the song.
I used to love blues (and still do) but for a long time after a relationship with a musician went south it depressed the heck out of me.
About happy songs not working: I have had that happen too. I think the explanation lies in Abraham-Hicks' concept of the emotional scale.
If a happy song is too far up the scale in relation to the mood of the listener, it can be really annoying. Been there... So it's better to pick a song closer to the current mood but a step or two or three up from there. And then, another step up etc.
I think I'm going to work up a play list that has the entire scale represented, in order
(and then post it on my blog) so I can find a song that's where I am, and then move myself up, up, up...