Ten of the most memorable acts from around the globe perform for the judges. Four of these acts will advance - two chosen by a panel of superfans, one Judges' Choice and one who will receive a Golden Buzzer to perform in the finale.

Ten more of the most talented acts perform for judges Simon Cowell, Heidi Klum, Alesha Dixon and Howie Mandel. Four acts will advance, including one who will receive a Golden Buzzer to perform in the finale.