The claws were out on the Halloween-themed X Factor as Simon Cowell criticised fellow judge Cheryl Cole for not paying enough attention to one of her contestants.
The ferocious judge said Cole was not putting as much energy into helping Treyc Cohen as she was to grooming the other girls.
Cohen, who was wearing a red hooded dress, sang Take That's Relight My Fire in an attempt to get more public votes than last week when she was in the bottom two.
Cowell said: "Treyc I cannot fault that vocal. You are a great, great singer. The problem is that I do not think there is a connection between you and Cheryl."
He turned to his fellow judge and added: "You have got to put some of your energy that you are putting into the others into her."
Feisty Cole snapped back: "You are out of order. We have got a great connection."
He challenged her: "Where does she live?"
Cole looked livid when she retorted: "I went to get her - Birmingham."
The pair continued to bicker after Cher Lloyd's "incredible" performance of Stay by Shakespears Sister.
Cowell, who dubbed Lloyd's version of the song as the "best performance of the season", said: "My only criticism is that obviously Cheryl is obviously trying to turn you into her."