EL SEGUNDO, Calif., July 18, 2025--Mattel, Inc. (NASDAQ: MAT) announced today that Monster High and global girl group KATSEYE have teamed up to debut a musical collaboration: a reimagined version of ...

Hilariously, Love recalls not being too enthusiastic about the idea of singing a song called “Monster Mash.” As she later told Billboard, she remembered thinking, “Oh please. A Halloween song?

Now, KATSEYE’s version injects fresh vocals, updated song lyrics, and an empowering tempo that celebrates individuality — a core tenet of Monster High and the breakout group.