, the makeup mogul lay in a large white bathtub.
Her body was painted green and she appeared to have on a semi-sheer black jumpsuit.
The mom of two was cradling a plastic skeleton.
There were candles lit all around her and plastic bats stuck on the wall.
Hailey provided no contest for the photos and fans were both intrigued and confused.
Kris Jenner commented: "OMG what's happening over there????"
Khloe Kardashian also wrote: "Wtf is happening."
KOURTNEY
Kourtney has spent much of the month of October showcasing her spooky decor inside her massive Calabasas mansion.
From time to time, however, she has slipped into a festive look to give fans the full package.
Recently, she posed for an impromptu photoshoot at home in a sheer top and black mini-skirt.
The mom-of-three flaunted her thin legs in a black satin mini skirt which she paired with a long-sleeve tattoo print mesh top, that exposed her black bra underneath.
The Poosh founder completed the look with a pair of black knee-high boots as she posed with her legs crossed whilst she pouted at the camera.
In a second shot, Kourtney was caught mid-hair flick as her short brunette bob hair hung in the air and fans got a glimpse at her tiny waist.
She swapped sexy for scary as she teamed up with her husband Travis Barker for a Halloween look.
The pair posed in bed in matching skeleton costumes that zipped up to cover their faces.
Behind them was a banner that appeared to read: "Until death do us part."
KIM
Kim, 42, celebrated her birthday in style as she paid homage to the late singer Aaliyah.
The SKKN mogul stepped out in a sparkly bra top and matching pants with a chunky choker featuring a cross detail.
She celebrated the special occasion with a trip to Las Vegas, but it wasn't all fun and games.
Fans ripped the Kardashians star for not noting that the look was heavily influenced by the late singer who died in 2001 at the age of 22 in a plane crash.
One wrote on Reddit: "Right like stop stealing other women’s iconic outfits lol."
Another posted: "I knew this look seemed familiar. Can Kimmy do anything original??!"
"She didn't even say it was based on Aaliyah, at least have the respect to do that!" a third raged.
Kim was previously slammed for dressing up as Aaliyah for Halloween in 2017, with critics accusing her of cultural appropriation.
She said in the wake of the backlash: "I saw online that some people thought my costume was in poor taste and I am truly sorry if that offended anyone, but I wasn't dressing up as a race or culture but rather as a woman whom I admire.
"We don't see color in my home. It's all love and respect."