Her new femme fatale-coded look had fans doing a double take.Jennifer Lopez at the Stella McCartney Spring/Summer 2027 fashion show during Paris Fashion Week on September 30, 2026Credit: Getty ImagesThe GistJennifer Lopez unveiled a vampy hair transformation in a mysterious video shared on October 11.The “On the Floor” singer was filmed with a darker hair color and smudged black eyeliner while stepping out during Milan Fashion Week.Lopez sent lo…