Kylie Minogue has said she finds it so hard to switch off after judging The Voice UK that she finds it difficult to sleep.

The Australian singer told the Daily Star, "It's really hard to switch off when you leave the studio. You become so invested in the acts. My sleep gets interrupted because you know you have to make decisions the next day and you don't want to.

"Some parts of being a coach are great. But then there are sticky moments when it doesn't matter what decision you make, it isn't going to be any fun. And then you think about it later on and wonder if you made the right decision."

The singer recently revealed that she had to be talked into joining the judging panel by and now understands why her sister Dannii enjoyed working on the X Factor so much.