The Vampire Strikes Back

The gang travels to an old Transylvanian castle on a rainy night to watch the shoot of the Hex Girls new music video Wanna Wed, But I Fled. But when they get there, they find out that the band is breaking up, since there's a vampire on the loose. Fred decides to go straight to trapping the vampire. They do so, only to discover there's another vampire lurking around. It's up to Scooby and the gang to solve the mystery and prevent the Hex Girls from breaking up.