Kelly Osbourne Rips Dannii Minogue: “She’s A Middle-Aged Devil!”

The always acid-tongued Kelly Osbourne has unleashed a scathing war of words on singer Dannii Minogue after The X Factor judge called rock n’ roll matriarch Sharon Osbourne out for being a tyrant when they were both judges on the popular talent show.

In her new autobiography — Dannii: My Story — Dannii recalls her first night on the UK series, which was characterized by Sharon bursting into her dressing room and reading her the riot act in Full Bitch Mode.

She “demanded to know why I hadn’t gone to the press to tell them what a nice person she was…The minute she left, I burst into tears,” Dannii writes. “I’d managed to hold it together while Sharon had been there, but once she’d gone I couldn’t hold it in, and I wept into my hands…Sharon was looming over me screaming and swearing… five minutes later she was holding my hand on stage. I wasn’t crying because I thought there was any truth to what she’d said – I was crying because someone I had previously looked up to had bawled in my face and ruined my big night.”

Kelly didn’t waste a second, slamming the Australian pop singer, 38, in a biting Twitter attack. Kelly defended her famous mom, despite the fact that Sharon also ripped in a scathing attack on the pages of a memoir released by Motley Crue rocker Vince Gill earlier this month. (And let’s not forget that unfortunate attack on Megan Hauserman’s weave that got Osbourne booted as headmistress of VH1’s Charm School.)

“The best thing to happen to dannii’s career was that my mother hated her,” the younger Osbourne fumed.

“She needs to shut her mouth and concentrate on motherhood!”

“I will be the first one to admit that my mother did not play her cards right when came to dannii but trust me when I say Dannii is the devil. Dannii you are so lucky that I respect Simon enough to not tell the truth about what really happened. wa wa wa you poor middle aged victum (sic).”

Ouch! Kelly had even more to say:

–“Sorry I have just had to deal with this bullshit 4 years and i have kept my mouth shut but i am sick and tired of her lies enough is enough.”

– “I think you all forget i was there i saw everything and if my mum was the ‘bully’ why was she the one the left the show?’

–“To the 12 Dannii fans out there I ask you this question what would you do if someone wrote a book of lies about your mother?”

Dannii’s autobiography, Dannii: My Story, goes on sale Sept. 30.