Nick Grimshaw thinks Simon Cowell is a "diva".

Nick Grimshaw

Nick Grimshaw

In a jokey exchange with an 'X Factor' hopeful at auditions for the ITV show, Nick used the choice word to describe his boss and fellow judge.

He told the contestant: "I love a diva - that's why I signed up, so that I could work with Simon."

Throughout the auditions yesterday (09.07.15), the BBC Radio 1 DJ - who made his appearance alongside Simon, Rita Ora and Cheryl Fernandez-Versini - mocked his boss as he made a number of remarks to hopefuls who had their dreams dashed as they crashed out of the competition, the Daily Mirror newspaper reports..

He told one: "The good news is your girlfriend must love you if she thinks you can sing 'cause you really can't."

And added to another: "I'd love to go on a night out with you but I never want to hear you sing ever again."

Meanwhile, Simon recently defended his decision to hire the 30-year-old television personality as a judge on the talent show.

He said: "When I first appeared on TV, nobody knew who I was. I just ran a record label. I actually never even got paid the first time I did 'Pop Idol'. But I thought: God, this is amazing, I can sit on a show and find artists. It's fantastic.

"I have an issue with artists judging other artists. I would never allow a group of artists to run the record label. That would be crazy. You have to balance it up a bit."