Sinitta has warned "perfect" Cheryl Tweedy not to take her job on the 'X Factor'.

Sinitta

Sinitta

The 'So Macho' hitmaker was convinced her friend and former lover Simon Cowell had chosen her to join him as his special guest during the Judges' Houses round of the competition, but she's livid that there's rumours to suggest he's now decided that the former Girls Aloud singer - who used to be a judge on the singing series - will help him out when it comes to choosing what acts he'll take through to the live shows.

Speaking to The Sun Online, she said: "You can't look like that, have hair like that, have Liam [Payne, her boyfriend], have the perfect baby, the perfect body, the perfect face, be a pop star, be drop-dead gorgeous and take Judges' Houses.

"She needs to stay in her lane a little bit. I love you Chez but don't even go there - not that I'm bothered. I thought I was coming back but now I've heard Cheryl is coming back. Simon has been a bit quiet - on text messages and Whatsapp."

And the 53-year-old singer doesn't think Cheryl, 34, will be able to provide entertainment like her as she'll never rock up naked with leaves covering her bits.

She explained: "Well let's put it this way - has Cheryl ever done Simon's judges' houses? Would it be appropriate? Would she wear leaves? It's like I'm defending my job. Not that my face doesn't look better. I'm behind them 100 per cent. But Cheryl doing judges' houses - that's a little below the belt."

Sinitta admitted two months ago that Simon, 57, had made a huge mistake by replacing her with Mel B last year on the show and claimed he wanted her back.

She said at the time: "I'm going back to the 'X Factor' this year.

"Simon has admitted he made a big mistake by replacing me with a Spice Girl -- even though they are fabulous.

"He's realised it's not always about who's the most successful or who's made the most money. It's about chemistry and together we have that, so he said he wants me back."