From Kylie and Dannii to Patrick Swayze and his scary bro, the world of showbiz is littered with celebrity siblings...

Kylie and Dannii Minogue

Kylie has established herself as a genuine pop icon, regularly churning out chart-topping albums and sell-out world tours.

Strange then that her younger sister, who would struggle to fill a church hall, advises young wannabes on how to make it big.