Simon Cowell is "definitely talking" to Britney Spears about being a judge on US 'X Factor', Louis Walsh has confirmed.

The 'X Factor' judge revealed Simon - who recently said the talent show would be a "walk in the park" for the 'Toxic' singer - has been in negotiations with the 30-year-old blonde about being a panellist on the programme.

He said: "I was out with Simon Cowell during the week, he's in London. You know like you do and I know he is talking to Britney. He's definitely talking to Britney to do his American show. Absolutely true!"

Louis is expecting Take That singer Gary Barlow, N-Dubz star Tulisa Contostavlos and himself to return to the UK 'X Factor' for the next series later this year, but he is "not sure" whether 'Down For Whatever' hitmaker Kelly Rowland will be a judge on the show again.

Speaking on 'Craig Doyle Live', he added: "I think I'll be back, I think Gary will be back. I think Tulisa will be back. Dermot's definitely back! I'm not sure about Kelly. I'm not sure. No-one is contracted guys. I loved Nicole Scherzinger."

Meanwhile, Janet Jackson has ruled herself out of replacing Paula Adbul and Nicole as a judge on the US version of the talent show.

She told Insider.com: "I'm very flattered that 'X Factor' let me know that I was being considered for next season, but it just wouldn't be possible."