Sharon Osbourne and Nicole Scherzinger clashed over 'The X Factor' categories.
Sharon revealed that Nicole was unhappy when Sharon got the category she wanted and it led to a conflict between the pair.
Speaking to The Sun Online, Sharon said: "There's always conflict - that's what's so exiting you can't all smile all the time.
"My conflict is that Nicole wanted my category - and I'm so happy."
Despite the conflict, Simon Cowell insisted he has no plans to change the judging panel as he thinks the current line-up of him, Sharon, Nicole and Louis Walsh is a winner.
He said: "I have huge respect for these three even though we do fight.
"It has to work for us and it has to work for the contestants.
"And the most important thing on the show is you must have trust from the contestant.
"If they don't trust you then you've got a big long-term problem."
Meanwhile, Simon believes that 'The X Factor', which is currently in its 14th season, has a long future ahead.
He told the Daily Mirror: "If you had asked me years ago how many more years I could do, I would have said if we can get to five more years then we have done well.
"What I have noticed over the last two years, which is a good sign, is that I'm seeing younger and younger kids turn up to the show.
"So I do think it will last a little bit longer than I thought."
The latest series of 'The X Factor' will air on ITV at 8pm tonight (02.09.17).