Remember the Halloween party scene in “Mean Girls,” where Lindsay Lohan’s character Cady is super embarassed after going all out as a zombie bride? Here’s a GIF, if you need a reminder:

Well, Khloe Kardashian can definitely relate. She showed up to her nephew Mason’s birthday party on Saturday in full costume as Sally from “The Nightmare Before Christmas,” rocking a bright orange wig, full face makeup complete with fake stitches, and a ragdoll dress. Meanwhile, Kendall Jenner opted for more subtle face makeup, and Kylie Jenner didn’t dress up at all.

“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. lol thanks @kourtneykardash #MasonsBirthdayBash,” Kardashian captioned one of the photos she shared to her Instagram account:

A photo posted by Khloé (@khloekardashian) on Nov 11, 2014 at 5:32pm PST

Makeup by @joycebonelli !!! Masons birthday bash

Une photo publiée par Khloé (@khloekardashian) le Nov. 11, 2014 at 4:24 PST

How very Regina George of you, Kourtney.