X Factor judge Sharon Osbourne apparently quit the show after a huge behind-the-scenes row with fellow judge Dannii Minogue.

Sharon is thought to have gone to Dannii’s dressing room minutes before the show went live on air to wish her a happy 36th birthday.

But she left the beautiful Australian pop star in tears after launching into a vicious verbal attack, according to reports in The Sun.

A source said: “Dannii was crying so badly she had to have her make-up re-done three times. All of Sharon’s frustrations came out.

“Dannii tried to keep calm but there’s not much you can do when Sharon is at full throttle.

“She’s been jealous of Dannii getting all the attention and publicity ever since she was brought on to the show.”

These latest revelations come after reports in the press that Sharon would NOT be returning for the next series.

There was no sign of the row when the first live final began on Saturday as Sharon and Dannii came out holding hands.

But Sharon later walked off the live results show, after two of her acts Kimberley Southwick and Alisha Bennett ended up in the sing-off.

Sharon said: “I’m out, gone.” And as executive producer Richard Holloway stepped in, she snapped: “F*** off, I’ll say what I f****** want.”

The show’s new host Dermot O’Leary told viewers: “Sharon can’t choose between her acts,” as the remaining judges decided to eliminate 19-year-old Kimberley.

A spokeswoman for the ITV1 show said: “Sharon was very upset. We’re hoping she’ll be back next week.”

Certain Sharon would not want to violate her contract, an insider added: “She is likely to be back.”