The Kardashians gathered up for Mason's fifth birthday. and 's son will turn 5 on December 14, but the family celebrated it a month early over the weekend with a horror-themed party. "Twas the nightmare before Christmas," Kourtney captioned a picture that showed a giant Jack Skeleton doll as decoration.
and were among who dressed up as spooky characters from Tim Burton's classic animated film. They posted pictures on Instagram. "Scary-go-round. Mason knows how to throw a good party," Kendall gushed. was also in attendance, but was a no-show.