Published Monday, 30 September 2013
Louis Walsh, Sharon Osbourne, Simon Cowell & Dannii Minogue pictured in 2007. (© Getty)
Minogue joined the X Factor panel in 2007 in its fourth series to sit alongside Osbourne, Cowell and Louis Walsh.
Osbourne eventually quit the show amid reports of in-fighting with Minogue.
In her new autobiography, being serialised by The Sun, she said the situation between her and the singer became "unbelievably bad".
She added: "When she joined X Factor as a judge, Simon fancied the pants off her. I get that. He's single, he's the boss and he can do what he wants. But during filming it was obvious to me that there was some sort of relationship going on between them. And the more it progressed, the worse it became between her and me.
"For me it made her so unbearable to work with that I just couldn't take it. It was horrible. My stomach knotted with anxiety about it and as each show loomed I would wake up and think "Oh God, I have to spend the day sitting alongside her again"."
The antics behind the screen had gone up a gear with her sticking her tongue in Simon's ear and giggling like a bloody teenager as Louis Walsh and I stood there like a couple of gooseberries.
Cowell and Minogue's relationship first came to light last year in biography Sweet Revenge: The Intimate Life of Simon Cowell.
Osbourne claims the fling caused Minogue to embark on a huge power trip: "The closer she got to Simon, the more I felt she started telling the producers what to do. Suddenly, from being the new girl, she was saying, 'This isn't right'...
She said Minogue would walk past her without even making eye contact and Minogue's arrival meant it was "rapidly turning into an odious chore - I found it hard dealing with a sulker".
Osbourne eventually called a meeting with Cowell, giving him an ultimatum that either Minogue was axed or she intended to quit.
Show creator Cowell said he wanted both to stay but during protracted negotiations about fees in 2008 Osbourne felt she could no longer handle "that toxic atmosphere of standing behind that screen inches away from someone exuding utter disdain".
She admits in her book Unbreakable that the main reason she left the series was because she did not get the pay she was demanding, but added: "The Dannii business was in there too."
© UTV News