"Earth, Wind, Fire, and Air" is a song by the Hex Girls, a fictional female eco-goth band making few appearnces in some Scooby-Doo series and movies.
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.