'X Factor' judge Kelly Rowland: Dating contestants is 'completely' against the rules

x-factor-kelly-rowland-late-late-show-craig-ferguson.jpg "X Factor" judge and mentor Kelly Rowland appeared on "The Late Late Show with Craig Ferguson" Monday (Dec. 16), where she talked about, among other things, the "X Factor" policy on dating contestants -- which was apparently made very clear right from the get-go.

"It would completely be against the rules," Rowland says. "That was one of the first things they said. ... It's not professional."

Perhaps the "X Factor" producers were remembering back to the days of the "American Idol" scandal with Paula Abdul and Corey Clark. No fraternization now.

Anyway. Rowland also says that the hardest part for her was the audition round.

"I will say when we did auditions, that was the hardest part. There were people coming in and they have these voices ... and it didn't work out all the time. There was one guy who came in and he was so sweet and he had the voice of Elmo and I'm thinking to myself, 'Baby, I don't know if this is for you,'" she laughs, saying they were trying so hard to encourage him to do animation or puppetry.

Finally, as both Ferguson and Rowland are Grammy nominees this year, they pinky-swear to vote for each other, since the Grammys are peer-voted awards. It was pretty cute.

"The X Factor" finale is Wednesday, Dec. 18 and Thursday, Dec. 19 starting at 8 p.m. ET/PT on FOX.

Photo/Video credit: CBS