I'm very, very much obsessed with four songs right now:
Bridge Over Troubled Water. This one because of Garfunkel's voice and the piano.
Canon in D. I have one I really like on my iPod. Sounds like three violins, a cello and a harpsichord. This one because of the violins towards the end.
Okay, I don't remember the exact name of the song but it's a violin concerto by Vivaldi and it sounds like it's in F major. I could probably look it up but I'm lazy. This one because of a single part in the middle of the song.
I forgot this one because I was listening to it, hah. Baker Street. But only the first 36 seconds. After that the song sounds like something you'd hear in a Goodwill store.