Billie Holiday's I'll Be Seeing You is one of my absolute favorites... The combination between her voice and the sad music trailing is perfect.
Also, soundtrack music is great especially if the movie was great. Listen to this exact section of this song because it's beautiful. But it gets lame after a minute or so:
*CLICK HERE! The Notebook Soundtrack Selection*
The wonderful Shigeto came out with a new mix a few days ago:
The painted Veil was on some channel the other day and I find the music of course, to be absolutely perfect! Check it out, (Composed by Lang Lang)
Also, a soundtrack that MUST be noted is of course the ever loved Amelie: