As Scooby Doo and the gang sneak closer to the source of light , they reach a clearing where the Hex Girls is rehearsing for a show .
As they get closer to the source of the light , the sound of guitar feedback can be heard , and when they reach a clearing they find the all-female goth rock band , the `` Hex Girls '' , rehearsing for a show .
Scooby-Doo! and the Witch's Ghost