Every Halloween, the internet hosts its own chaotic fashion week — led by celebrities who know how to work a feed. Instagram 's the red carpet, TikTok 's the after-party, and the dress code is simple: "whatever will break the algorithm."

This year was no exception. Celebs traded couture for cosplay, turning Halloween into a high-production content drop. The members of KATSEYE embodied different Mariah Carey eras in a stylish red-carpet spoof featuring Bowen Yang. Demi Lovato leaned into memehood by resurrecting her infamous alter ego, Poot Lovato. And Kim Kardashian dressed up as a TikTokker, a reminder of just how much influence these social media stars now hold .

What’s striking now is how few of these costumes ever leave the set.

Halloween has become less a party than a photo s

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