For me it is "The Lark in the Clear Air." I sang it for my mother's funeral (recorded it first at local studio - I could not have done it live). My DD (voice like an angel) recorded it too and it was played at her wedding; and then again at Dad's funeral last summer.
It is beautiful haunting music and now presses weepy buttons for me - not surprising really!
Here's Aled Jones singing it..........http://www.youtube.com/watch?v=3-bDj4akXCE
AIBU to wish toilet cubicles were a decent size.
What can be done about the avaricious and selfish
What's one health habit you've started that's actually made a difference?
with that beautiful tenor soaring over it.

. Out of this slender body dressed in a faded tracksuit and Converse trainers, poured the voice of an angel as he sang "You Raise Me Up", accompanied only by his electronic music box: