Simon Cowell separated ‘X Factor’ judges Cheryl Cole and Dannii Minogue last week because of a lack of chemistry between them.
The head judge of the ITV talent show ordered the singers to sit apart on last Saturday’s show in order to liven up the panel.
A source told the Daily Mirror newspaper: “Simon doesn’t think there is enough banter and interaction between the girls - they basically lack chemistry.
“It has certainly ruffled some feathers - Dannii wasn’t at all happy.”
The move comes just days after Simon blasted the female mentors and judges for seeming to spend more time on their appearance on the show than looking after their acts.
A source said: “Cheryl and Dannii aren’t mates like Louis and Simon, who have no compunction about hurling insults at each other.”
Cheryl recently joked that she should “hit” the head judge because he was so "rude" and "nasty".
Last week the Chinese Embassy - which borders onto the ‘X Factor’ house - complained about noise from fans who crowd the streets hoping to catch a glimpse of the contestants, but the Ambassador today revealed she was a huge fan of the show and had “favourite contestants”.