Sharon acted as a judge on the X Factor for 2004 to 2007, again in 2013 before taking a break to return in 2016.
This year she’s set to join the judging panel alongside Simon Cowell in the live shows, but ahead of that she’s commented on her boss.
In an appearance on a US radio show with Howard Stern, the 65-year-old said the mogul would do “whatever it takes” to get “his f*****g fat face on the TV”.
However, she did go on to say: “I like Simon, he’s been very good to me but he’s a pain in the a**e.”
Howard went on to ask if she would save himself or Simon on a sinking boat.
Sharon exclaimed: ”We would put a f***ing brick around his neck and throw him over. I will drown you mother f****r. Absolute…he’s gone.”
The current judges on the X Factor are Louis Tomlinson and husband-and-wife team Ayda Field and Robbie Williams.
It was reported that Ayda and Robbie had been signed up for a joint deal of £10 million.
Simon went on to describe it as “the best £10 million [he’d] ever spent”.
Sharon went on to criticise the pay check compared to her own as she said: ”So Simon I have a clause in my contract in my contract ‘favoured nations’.
“Simon goes to the press and goes this is the best £10 million I have ever spent.
“So I go, ‘I have favoured nations, where is my f***ing £10million? I have a clause. I am a businesswoman.”
Sharon also denied rumours that her own fee was £1 million as she declared: “I am not f*****g doing it for a million. It is a principle – you want me you have to pay what I am worth.
“And the thing is these networks aren’t used to it. Because people are always half way up their a*** for a gig. And at my age I won’t f*****g beg.”
The mother-of-three also spoke on why she wasn’t contracted to appear at the auditions stage of the competitions.
Asked why her contract changed this year so she didn’t appear at the auditions, she blasted: “Oh f*** I don’t have to have those kids singing in my face.
“Those little s***s. They all suck. It is like hey is this f*****g karaoke or what?”
Sharon also commented on the addition of Robbie and Ayda to the judging panel.
She said: “Listen to this he has got two f*****g people in the show. He has changed the panel. Robbie Williams, he’s a good guy, and he has got his wife on.”
Howard then asked “what does she know?”, to which Sharon replied: “I don’t know. She was in a soap opera here years ago.”
It seemed Sharon was willing to joke about her future on the show as she went on to ask Howard: “Are you giving me a job when I get the f*****g sack?”
The X Factor returns on Saturday at 8.30pm on ITV.
