The 39-year-old star is one of four judges on the UK show along with Cheryl Cole, Louis Walsh and Simon Cowell.
Minogue has one act, Matt Cardle, left in the competition, who is one of the favourites to win, and she revealed she finds the live shows really terrifying.
She said to UK's Marie Claire magazine: 'I do find it nerve-racking. Every Saturday night at the beginning of the show when I step out onto the stage, I'm terrified. Not about me, but how everyone's going to get on - whether they'll stuff it up.
'You just can't help getting really involved with your people. It's their life.'