Cheryl Cole reportedly got very angry with Simon Cowell on Saturday night, after he criticised her £1500 David Koma dress.

As Cheryl was offering her judges critique when Simon Cowell told her to sit up straight before she exposed her assets to the nation. Cheryl laughed the comments off on air, but when the ad break began she belted Simon and shouted:

“Why did you do that? What did you do that for?”

A source told The Sun: “Cheryl tried to compose herself but she was furious at Simon. She felt there was no need to mention it on air – he could have waited and said something discreetly.

“But the dress was risqué. From the side you could see everything.Some of the risqué outfits just don’t work outside of a fashion shoot.

“And the show is meant to be all about the artists, not about their outfits.”