Rachel and Kirsty are thrilled when their fairy friends whisk them away to the Fairyland Music Festival! But the festival is a mess. Jack Frost has stolen the Superstar Fairies' magic music clefs. He's determined to be the biggest superstar in the world and the girls are determined to stop him! What's that awful noise? Without Adele the Voice fairy's music clef, superstars' voices are cracking and squeaking. Rachel and Kirsty have to do something and fast!