This was a Halloween suggestion I received years ago! It's a cover of Jack's Lament (Nightmare Before Christmas) sung as Kankri (Homestuck).
Link to changed lyrics: https://toycarousel.tumblr.com/post/100515711527/one-of-the-halloween-suggestions-i
Update Required
To play the media you will need to either update your browser to a recent version or update your Flash plugin.