Scooby-Doo! Mystery Incorporated

In Fear of the Phantom (1x7)

Air date: Aug 23, 2010

The Hex Girls (consists of Thorne, Dusk, and Luna), Velma's favorite band, come to Crystal Cove and plan to give the gang a concert. But things go awry when The Phantom, an evil specter, suddenly appears with the intention of permanently taking The Hex Girls out of the music business.