The 35-year-old star, who is currently expecting her third child, made an appearance on British radio station Heart and was asked if there's any possibility of her leaving LA behind and moving back to the UK.
She said: 'Funny you should say that, I think I might be coming over for quite some time at some point next year.'
But the star then realised what she'd said and tried to backtrack.
She said: 'Maybe that was a secret!'
When the show's hosts Jamie Theakston and Harriet Scott started speaking about The X Factor, she tried to change the subject.
Told she'd be good in the role, she laughed: 'Maybe so... Anyway, so! I'm in so much trouble, why did I do this interview! It's such nice weather today.'
The new series of The X Factor in the UK is expected to see Cheryl Cole and Simon Cowell replaced as they launch the new US show.