Halloween 2025 saw Hollywood and global stars go all out with bold, viral looks. Heidi Klum stunned as Medusa, Lady Gaga embodied her Garden of Eden, and Blackpink's Lisa dazzled as Jibaro. Megan Thee Stallion, Paris Hilton, and Julia Fox added drama and glam, while KATSEYE's Mariah Carey-inspired costumes ruled social media trends.