Over the weekend, North West and Penelope Disick celebrated their birthdays with a mermaid-studded affair. As expected, the party was decked out with princesses, mermaid tails, multiple cakes, Khloé in a lavender wig, etc. — the usual stuff found at a 3-year-old's party. But one verrrry unexpected aspect came from one Kim Kardashian, who resurrected her 2012 Halloween costume for the party.

In a sea of guests dressed in, y'know, regular clothes, Kim and her full embrace of the theme stick out like a sequin vision. Of course, the most surprising part of this entire thing is not that Kim might've forgotten to mention the costume part to the rest of the guests, but, rather, that she repeated an outfit.

Yep, here she is at the 2nd Annual Midori Green Halloween Party in 2012 in the exact same shell bra, mermaid skirt, and necklace.

Fortunately for Kim, no matter what North gets into in the next year, she has plenty of costumes to break out for her fourth birthday party.