The former Destiny's Child star is frontrunner to replace Britney Spears on the judging panel of the third series of the singing competition when it airs later this year.
Kelly first appeared on the UK version of the show in 2011 when she joined Gary Barlow, Tulisa and Louis Walsh on the judging panel but left after just one series.
At the time she said: "I love the UK and being part of the show last year. Mentoring the girls was such an incredible experience I will never forget. I would like to thank Simon for the great opportunity and asking me to be a judge last season."
But now it looks like the 'When Love Takes Over' singer will be joining Simon Cowell, Demi Lovato and a fourth, as yet unannounced, judge on the show.
A source told The Mail Online: "Kelly knows the X Factor, she's aware of what it takes to be a judge and she's also outspoken.
"Simon has always remained a fan of Kelly's and she's most definitely in the mix to join the judging panel on X Factor USA."
The full judging line-up is set to be announced next month.
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