Guy Sings the Lyrics From ‘Deck the Halls’ to the Music of ‘War Pigs’

I have dislike towards magic, mainly because my tiny brain can't figure out how the trick is performed, even though I know it's probably rather simple.

To me, these seamless mashups are like magic. They seem so simple to perform, yet I can't wrap my head around the complexity of it. It's perfect. Tis the season...

Black Sabbath's Geezer Butler even shared this on his personal Facebook page.