The ‘So Macho’ singer has been left furious after losing her usual role at Judges Houses to the former panellist, unleashing a tirade against her BFF in an interview with The Sun.
After a hiatus of three years, Sinitta said she was excited to be back on the show, as last year she was unable to take part due to a breast cancer scare.
She was also hoping it would help take her mind off her painful split from partner, Jason Gale.
And Sinitta even had a typically incredible outfits planned for her big return, only to find former ‘X Factor’ judge Cheryl would be reuniting with Simon in her place, when filming takes place in the south of France later this week.
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Cheryl is joining Simon at his 'X Factor' Judges Houses
A show spokesperson told The Sun there was “never formally offered a role” at Simon’s Judges Houses, but “would love her to be involved later in the series”.
‘The X Factor’ continues on Saturday (30 September) at 8pm on ITV.
'X Factor' Judges Through The Years
Series 1-3 (2004-2006)(01 of11)
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The original line-up: Sharon Osbourne, Simon Cowell and Louis Walsh (credit:ITV)
Series 4 (2007)(02 of11)
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All change: Dannii Minogue joins Simon Cowell and Sharon Osbourne, with Brian Freidman replacing Louis Walsh.Dermot O'Leary also replaces Kate Thornton as the show's host.
Series 4 (2007)(03 of11)
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The return of the Walsh: Louis makes a comeback after Brian Freidman is axed from the panel after only a few days of auditions.
Series 5-7 (2008-2010)(04 of11)
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The golden era: Cheryl Cole replaces Sharon Osbourne, joining Simon, Dannii and Louis.
Series 8 (2011)(05 of11)
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A mass exodus: Gary Barlow, Tulisa and Kelly Rowland join the only original remaining judge, Louis Walsh.
Series 9 (2012)(06 of11)
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Schermazing: Nicole Sherzinger replaces Kelly Rowland, joining Gary, Tulisa and Louis.
Series 10 (2013)(07 of11)
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She's BACK! Sharon Osbourne rejoins the panel after five years, replacing Tulisa and joining Louis, Gary and Nicole. (credit:Rex)
Series 11 (2014)(08 of11)
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REUNITED: Simon and Cheryl return alongside Louis Walsh and new judge Mel B. (credit:Syco/Thames/ITV)
Series 12 (2015)(09 of11)
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Bye bye Louis: Nick Grimshaw and Rita Ora replace Louis and Mel, as they join Simon and Cheryl on the panel. Meanwhile, Caroline Flack and Olly Murs step into Dermot's shoes as hosts. (credit:Twitter)
Series 13-14 (2016-17)(10 of11)
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A vintage line-up: Nicole, Louis and Sharon all stage sensational returns to the panel after the departures of Cheryl, Nick and Rita, while Dermot also returns as host. (credit:ITV)
Series 15 (2018)(11 of11)
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WTF?! Louis Tomlinson becomes the first former contestant to join the panel permanently, while Robbie joins the panel alongside his wife and 'Loose Women' panellist Ayda Field. (credit:Doug Peters/EMPICS Entertainment)