S16E18 A Star Is Torn
After discovering that she is a good singer the family persuades Lisa to enter a junior 'American Idol' competition, in which she does well, singing a song written for her by Homer, who becomes her manager. They become very successful, making it to the finals but here they have a falling out, Lisa sacking Homer, who switches camps to managing popular favourite Johnny Rainbow. On stage Lisa still sings the praises of her father. Surely he will not let her down...