what is the song that spike sings in the final episodes of buffy?

Answer 1

I wish i remembered a song from spike in the last episode i must be getting old! I do remember the last line spike says i think it went....

Buffy: I love you.
Spike: No, you don't. But thanks for saying it. Now go. I want to see how it ends.

Something like that and if i remember a song i will add it on.

Well the only song i know of after checking is the one the chap above me spoke of which is 'Early One Morning" from the episode "Lie's My parents Told Me" Season 7
Early one morning, just as the sun was rising, i hear a young maid sing in the valley below. "oh, don't deceive me. oh, never leave me. How could you use a poor maiden so?"

Answer 2

it is Early One Morning, Folk Song.
I am assuming you meant the one that was a trigger from him to kill people. Sorry if that isnt what you meant