“Baby You’re A Haunted House” was first teased by Lola, Gerard’s nonbinary mascot, via Twitter before later teased by the two on Instagram a couple of days before its release on Friday, October 26, 2018. Gerard described the spooky song as “fitting for the holiday.” The track also features​ Gerard’s brother, Mikey Way, on bass.

Gerard described the song as,

about all​ our inner ghosts and demons and what it feels like being in love and having to deal with your own internal horror show.

This could be referencing the idea that this person is a haunted house in the sense that they look scary on the outside, but are worse on the inside.