It's already a controversial evening. Everyone's favourite Kate Nash/Alex Turner hybrid Lucy Spraggan is sitting tonight out after coming down with a dose of the Halloween Flu.
We're assured that her illness has nothing to do with the hard partying of midweek, though drinking buddy Rylan Clark is also said to be under the weather. We hope his dulcet tones aren't ruined by any sniffles.
Conspiracy theorists suggest that The Man has given Spraggers a bye because they can't think of anything for her that fits the theme. We don't buy that for a moment, as most acts will likely ignore spook night and just wear some devil horns anyway.
Anyway - this is a singing contest, not a pantomime! And we're hoping for some spooky songs and monster mash-ups tonight. Who will dare take on 'Thriller'? Will someone try to sing with a pair of plastic fangs in their gob? We're about to find out.
Join Digital Spy's live blog from 8.20pm tonight (October 27) as the X Factor live shows continue on ITV1.