Sources have suggested Kimberley, 29, is in final talks to land the role on the UK version of the show.
And fellow Girls Aloud singer and X Factor judge Cheryl, 27, is said to have fought her corner.
According to website Misformusic.com, a source said: 'Kimberley was worried that she wouldn't be suitable for the role with Cole as a judge, as she may have been biased towards her acts but now Cheryl is off to America she feels it is the perfect opportunity.
'Cheryl has put in a good word for her and bosses were impressed after seeing her present Suck My Pop last year. It's pretty much a done deal.'