According to the pregnant judge's sister Kylie Minogue, Dannii gets so "emotionally involved" with the contestants in the reality show 'The X Factor', that she often struggles to sleep properly.
Kylie - who has previously helped her sister select her finalists for the singing show - would love to join her sibling again for the show, but doesn't ever want to be as hands-on as Dannii.
She explained: "I'd love to do that again with her, go and do judges homes with Dannii. It was quite confronting, I didn't realise it would be that emotional and personal. Dannii made the decision, I helped her but I wasn't the one who had a sleepless night. You get quite emotionally involved with it, and she absolutely does."
The pop star has also admitted Dannii - who is due to give birth to her first child this month - and her fellow judge Louis Walsh are getting along better these days.
She added on BBC Radio One: "Louis was one of the few who gave my sister a hard time - although I do believe he's come around now... You can't say one thing all over the place with your friend Sharon Osbourne and then change your mind, but I do believe all is well. My sister did say that now she and Louis are on good terms, he's quite funny."
Meanwhile, it has been revealed Dannii's contestants will fly over to Australia to visit her - so she can spend more time with her new baby while she chooses her final three singing finalists.
A source added: "She won't need to be back in the UK until the live finals in October. By that time her baby will be old enough to fly."
While Dannii is on maternity leave from the show, she is being replaced during the audition stages by numerous guest judges - who are joining Simon Cowell, Louis and Cheryl Cole on a temporary basis.