Tonight, a former Bachelorette star channels Channing Tatum; an adrenaline-pumping display of acrobatics and a freestyle skydiving champ takes flight.

The best of the best return for the Semi-Finals! Judges Shane Jacobson, Lucy Durack, Nicole Scherzinger and Manu Feildel have selected 30 acts to come back and battle for a place in the Grand Final.