Cheryl Fernandez-Versini is considering quitting 'The X Factor'.

Cheryl Fernandez-Versini

Cheryl Fernandez-Versini

The Girls Aloud singer is set to hold crunch talks with Simon Cowell in Los Angeles this week as she weighs up whether she wants to return to the show.

A source told the Sunday Mirror: "It's a critical time and the talks will be a big factor in determining how the show looks this year.

"Cheryl will be the one who makes the decision on her future - she and Simon are great friends and he's totally supportive of her decision, whatever that turns out to be. They've got the show's best interests at heart and aren't rushing into anything. The talks could continue for some time."

While Cheryl's future on the show is in doubt, Louis Walsh and Sharon Osbourne are being tipped for an 'X Factor' return.

Simon is reportedly desperate to get Louis back on the judging panel after replacing him with Nick Grimshaw last year and Sharon is set to join him.

A source told the Sunday People newspaper: "Simon really wants Louis back. He wants his friend back by his side like the good old days.

"But he's coming up against resistance from producers, who are less certain about Louis' return.

"No decision will be made until Simon has this meeting with a top 'X Factor' official in Los Angeles on Tuesday.

"If Louis isn't back on board, then Sharon won't be. She likes the idea of the original panel and is very nervous about returning. She will only do so if Louis does too.

"Louis is desperate to get back on X Factor and he's doing all he can to make it happen."

Recently, presenter Dermot O'Leary, who was replaced by Olly Murs and Caroline Flack last year, was brought back for its upcoming season.