When Grandma Gallagher finds out that her granddaughter got into the talent show , she finally tells the truth about how her parents died - they were stomped to death while performing in a Riverdance-like competition . When Grandma Gallagher finds out that her granddaughter got into the talent show , she finally tells the truth about how her parents died - they were stomped to death while performing in a Riverdance-like competition , rather than being eaten by Hammerhead sharks as her grandmother had told her .