I'm obsessed with this song "Falling Slowly" by Glen Hansard and Marketa Irglova.

http://www.youtube.com/watch?v=87f5nj7cOjc

I haven't watched the movie it was written for ("Once",) but one of these days I will. The songs purity and honesty really grab me. The tones and chords are simple yet touching. I'm learning it on guitar right now. I asked my cousin to learn it on piano and we can play next time I'm at her house.