The songs I remember are ones I can hear later and still feel the emotions of the scene they are from.
Yes, exactly that!
"Save the Last Dance for Me" is one of my favorites - it's another one on my iPod and the counter has it up at some embarrassingly high number. (I really need to figure out how to reset that :)) To hear it is to imagine Brian and Justin dancing so beautifully together - only now I have a later dance in mind (it's an s6 one at a New Year's gala on a night that ended as happily as it began).
I haven't listened carefully to Svefri-g-englar. This one's still to be discovered, then.