SHARON Osbourne has reignited her feud with Dannii Minogue – slamming her for being “f***ing useless” on the X Factor.

Ozzy’s gobby wife – who used to be a judge alongside Dannii on the show in 2007 and now serves as a panellist on America’s got Talent – made the foul-mouthed comments during a rant about talent shows.

Despite still working on one of Simon Cowell’s creations herself, she slated the programmes, moaning about young wannabes who are desperate for fame.

Sharon, 57, blasted: “They’re queuing up now to get on – what’s that show called – We’ve got No F***ing Talent at all. It’s like a revolving door for t**ts.”

Then, when challenged about whether she is partly responsible for this due to her TV work, she hit out: “Listen, I actually walked from X Factor because I couldn’t stand the bulls**t anymore.

“I was getting well paid – very well paid – so it was hard to leave, but I did because they didn’t like me speaking the truth.

“They’d rather have some doll like Dannii Minogue as judge, endorsing this bulls**t.

“Dannii – I couldn’t stand her. She wasn’t so much a dim bulb as a bulb in a power cut. F***ing useless.”

It’s not the first time that Sharon has lashed out at Dannii, who is expecting her first child with Kris Smith in July.

She previously compared her to an annoying mosquito that she wanted to flick away and said her plastic surgery was “appalling”.

Shaz: Dannii's f***ing useless