Scooby Doo and the Witchs Ghost Vampires rock band Hex Girls Singing I will put a spell on youbrThe Hex Girls perform Hex Girl from the 1999 film Scooby Doo and the Witchs Ghost. Scooby Doo and the Witchs Ghost (1999) Hanna-Barbera Productions .brSong starts after 5 seconds. Hex Girl is a song performed by The Hex Girls. The Hex Girls is a fictional band consisting of the fictional characters Thorn, Luna, .brSong starts after 5 seconds. The Witchs Ghost is a song featured on the Scooby Doo and the Witchs Ghost soundtrack. It is featured during the credits roll.