The song that really gets next to me is a song by Building 429 called, "You Carried Me". It really gets to the heart of the matter and don't forget to try and catch the video of it. You will be touched as well.
I watched a movie about the slave trade becoming abolished and I did not know that the song "Amazing Grace" was tied to the movement. It was so uplifting at the point when they sang it that I got a little misty eyed.
Oh - that movie! I made the mistake of watching it with my three kids (then about 12, 7 and 4); and it had all four of us going! I ended up hiding the movie to prevent further traumatization.
The song that I didn't want playing in any stores or coffee shops for years (because I couldn't hear it without crying) is, "I'm everything I am because you loved me." It wasn't written with the mother/child relationship in mind; but, particularly since I have one son who's adopted, that song got me every time for ages. These days I can hear it without more than wistfulness - then again, the world is full of songs that get me going.
one song I know that makes me feel really sad, in an emotional way not in a depressed way.. is by Smashing Pumpkins and its called 'Landslide'. I dont know how many of you know this but its very touching