"Hex Girl" is a song originally performed by the fictional eco-goth band, The Hex Girls, on the movie "Scooby-Doo and the Witch's Ghost".
The band's voices are portrayed by actresses and singer-songwriters Jennifer Hale (as lead singer and guitarist Sally "Thorn" McKnight), Jane Wiedlin (as drummer and back-up singer Dusk) and Kimberly Brooks (as keyboardist and back-up singer Luna).
Hale, Wiedlin, and Brooks write and perform original songs for the band.