Nick Grimshaw mocks his best friend Rita Ora on the X Factor

It seems there is a lot of fighting on the X Factor this year – and this time it's between the judges. 

New X Factor judge Nick Grimshaw has ridiculed Rita Ora's judging on the reality TV show, even though they're meant to be BFFs. 

Harsh Nick. 

The 31 year-old has been seen mocking the singer for her frequent misuse of clichés on the show. 

Her latest blunder saw the 24 year-old claim it's impossible to "read a book by its cover" while critiquing an act. 

Nick said: "''Last night (sunday), this one really took the biscuit. Read a book by its cover? That's not right – it's judge a book by its cover. She gets her analogies just a little bit confused.''

The BBC Radio 1 Breakfast Show host said that there is more unfortunate misquotes to come. 

''It's yet to come on the show but I remember in the auditions (when she said) 'I feel like a fish that has jumped out of the water and has been run over.'"

''I said, 'Do you mean a fish out of water?'"

And Nick isn't the only one blasting Rita on the show, as she has been slammed by insiders as having "nothing useful to say", reports the Irish Mirror. 

Even viewers of the show agree as she appears to be making a lot of slip ups, including asking if Newcastle is in Britain. 

One viewer wrote on Twitter: "no way did rita ora ask if newcastle was part of england, I'm losing the will to live"

While another added: "rita ora just asked whether Newcastle was a British place… NO ONE CAN BE THIS STUPID I'M SORRY"

It seems that there will be a lot of back-and-forward bickering to come on the show, but back with the judges, Rita isn't the only one Nick is having problems with. 

He has also ridiculed Cheryl for her inappropriate use of the word "literally". 

''I like it when Cheryl says literally, but then what she says isn't literally."

"Like she says, 'You literally blew the roof off Wembley.' But they didn't blow the roof off Wembley. did they? Or, 'You literally blew me away.' 'But they didn't really blow you away Cheryl.''

It seems like there might be more action with the judges this year than the contestants!