Louis Walsh, so much so that they call themselves ‘Louisa’. But their alliance has led to a split down the judging panel. The N-Dubzsinger said: “Do you see the divide? Me and Louis – and Kelly Rowland and Gary Barlowhave become close and a member of the crew told The Mirror that the tensions between the two camps threatened to turn into “all-out war” in time for the live stages of the show.

“Basically Louis and Tulisa laugh a lot and mess around, and Kelly and Gary are there for the music and are more serious,” the insider said. “They are coming on the show from different viewpoints and for different reasons and that is splitting the panel down the middle.

“It hasn’t flared up in front of the cameras just yet, but it is getting worse and will come to a head on the live shows.”

The Judges’ Houses categories [uuid=4875836f-cb74-4bb0-b87d-10a2f27aeb84]were leaked earlier this week[/uuid] – Tulisa has been given the Groups to mentor, Gary the Boys, Kelly the Girls and Louis the Over 25s.