Scooby-Doo! Mystery Incorporated (2010)

S1E7 In Fear of the Phantom

Title: Haunted Melodies Plot: The Hex Girls, Velma's beloved musical group, are set to perform in Crystal Cove, much to the excitement of the gang. However, their plans hit a snag when a sinister specter known as The Phantom emerges, determined to eliminate The Hex Girls from the music scene for good. The gang must unravel the mystery behind this malevolent ghost to save the concert and their favorite band.