(You're Granny)

Backstory: Your Granddaughter was summoning the demon, she died doing it, and you pretty much think it's her. After a bit, you do realize but still let the demon stay due to behaving. Anyways now it's Christmas and "All I Want for Christmas Is You" is starting to play, the demon like most of the more recent generation hates that song and tries to block it out of the house but the music slips in and its all hell from there

Demon: panicking around the house