Cheryl Cole will apparently open up about her ex-husband Ashley and her firing from the US X Factor in an "explosive" new autobiography.

The Girls Aloud singer will discuss her failed marriage and being axed from Simon Cowell's Stateside show in the book, to be published by HarperCollins this autumn, The Sun reports.

A source told the newspaper: "She signed the deal for big money so she won't be able to hold back on details. Ashley should be worried."

News of the autobiography comes after author Tom Bower's book about Simon raised eyebrows last week.

The music mogul reportedly confessed he was "mesmerised" by Cheryl and would have liked to have had an affair with her.