Kourtney Kardashian held a "Nightmare Before Christmas"-themed party for her son Mason's fourth birthday on Saturday night -- and Khloe Kardashian went all out!
The reality TV show star attended in full-on costume as Sally, the ragdoll who falls for Jack Skellington, from the flick. Sporting a red wig, white facepaint and stitches all over her eyes, lips and forehead, Khloe looked picture-perfect.
And while sister Kendall and BFF and makeup artist Joyce Bonelli both sported some painted faces as well, only Khloe went all out -- and she says it was Kourt who tricked her!
"Kourtney pulled a 'mean girl' move on me and had me dress like Sally from The Nightmare Before Christmas while everyone else was mad chill," she captioned the pic above. "lol thanks @kourtneykardash #MasonsBirthdayBash."
Though we didn't see any photos of the birthday boy, Khloe did share the one below of Kourtney's other child, little Penelope. Seen with Bonelli's son, Zepplin.
How cute are they?! Those little Jack costumes are downright adorable!
Kourtney also showed off some of the impressive decorations from the bash, including a giant, 15 foot version of Skellington greeting party-goers at the door.
The Kardashians are known for their lavish parties.
Back in June, Kim held a Coachella-themed affair for North West's first birthday, equipped with ferris wheels, food stands and stages for karaoke.
While it looks like the party was a blast, there was some serious drama behind the scenes leading up to it. Kourtney, who was in the Hamptons for the summer at the time, was ticked off Kim held the soiree at her home without her permission.
Watch what happened when Kourt confronted her below: