The GGs answer a house call, find a "ghost baby," then learn they're at the wrong house. When the babysitter hears the girls in the house, she calls their rivals, the Ghost Bros, to the scene. Jason Schwartzman and Jason Ritter guest-star.
While Heidi struggles with her TV pilot, Angelica helps the ghost band reconcile their differences_and realizes she needs to reconcile hers with Heidi as well. Jack Black, Dave Grohl, and Val Kilmer guest-star.
A recording studio is haunted be a 1970s Southern country rock band. Before the GGs can solve the case, Heidi gets a reality TV pilot with her mom and leaves to shoot it, which causes a big fight between the GGs. Jack Black and Dave Grohl guest-star.