Whats good but sad songs?

It doesnt have to be new ones, I quite like old songs too

Sad Beautiful Tragic by Taylor Swift is VERY depressing but really good!! Also Last Kiss by Taylor Swift.

Homestuck-'Flare' http://www.youtube.com/watch?v=ktuDYYtbs2s
Homestuck-'Flare' with vocals http://www.youtube.com/watch?v=btHd1zrjkqY
Evanescence-'My Immortal' http://www.youtube.com/watch?v=cu7QvOQKcKk
Slipknot-'Snuff' http://www.youtube.com/watch?v=0TUnwu-X6pk
Kingdom Hearts-'The Other Promise'-Orchestral(A.K.A. Roxas' theme) http://www.youtube.com/watch?v=lM5oPVCRoOg

Go for a Billy Joel song like "If I Only Had The Words To Tell You" or and Elton John song like "Your Song".
I've heard more sad songs but they are just depressing.
Hope that helped! :)