Very few songs make me actually cry, but I have thought of two to share.
The first is Leona Lewis's version of 'Run' (a Snow Patrol song). I quite honestly have no idea what it is about it, just something in the quality of the high notes near the end just hits my tear glands or something. I don't even usually like modern pop music!

The second affects me for an actual reason. It describes in a very beautiful and affecting way how my beloved Gran was towards the end of her life. And it's probably how I'll be at the end of my life, too. This song makes me cry like a baby without fail. It's called 'Last Flowers To The Hospital', by Radiohead. Here it is:
Appliances have gone berserk
I cannot keep up
Treading on people's toes
Snot-nosed little punk
And I can't face the evening straight
You can offer me escape
Houses move and houses speak
If you take me there you'll get relief, relief,
Relief, relief
And if I'm gonna talk
I just want to talk
Please don't interrupt
Just sit back and listen
Cos I can't face the evening straight
You can offer me escape
Houses move and houses speak
If you take me there you'll get relief, relief,
Relief, relief, relief, relief
It's too much, too bright, too powerful
Too much, too bright, too powerful
Too much, too bright, too powerful
Too much, too bright, too powerful...