2x5 - What's New, Scooby-Doo?

The Scooby 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 they find out that the band is breaking up, since there's a vampire on the loose. Fred decided go straight to trapping the vampire. They do so, only to discover there's another vampire lurking around, so they go through the whole thing all over again to reveal a surprise twist to this mystery.