Eric and the Peculiar Pong

Despite his best efforts to become invisible, Eric is chosen to sing a solo in his school play. He’s so horrified that he isn’t even mortified by his mother singing fortissimo in the cinema, and being chucked out as a result! They have received another magical present from mad Auntie Rose: this time she’s sent perfume that appears to make the wearer sing!
Eric decides the only thing to do is use it himself at the play…