The dancer and singer is said to have already auditioned to replace her former Pussycat Dolls bandmate Nicole Scherzinger on the show, E! reports
Roberts is believed to be meeting executives from Fox later this week.
Scherzinger was hired as co-host for the first US season of the show, but moved to the judging panel after Cheryl Cole was axed.
She and Paula Abdul have been replaced for the second season by Demi Lovato and Britney Spears.
Scherzinger this year joined the UK X Factor judging panel as a replacement for former Destiny's Child singer Kelly Rowland.
She admitted last year that she no longer speaks to the Pussycat Dolls after their disintegration.
106 & Park star Terrence J is rumoured to be the male co-host for the upcoming show after announcing in May that he would be leaving BET
"Right now, I don't want to think of the next thing," he told E!.
"My first process before I make any decision or even think about anything is to take some time with my family who I've neglected a little bit too much and getting away.
"I'm going to take the month of August off and get away from it all. And then I'll come back and figure out what's next."