A cover of This Is Halloween that one of our VA's Hamish performed all on his own.

Art credit goes to Grey Gnu:
http://browse.deviantart.com/?q=Pony+nightmare+before+christmas&offset=24#/d3ee9fy

Lyrics by:
http://unoservix.deviantart.com/art/This-is-Nightmare-Night-334531513

This is Halloween and the Nightmare Before Christmas as copyright of Disney
MLP:FIM is copyright Hasbro.