Sinead O’Connor has threatened to shoot the pope if he visits Ireland in an expletive loaded assault on Pope Benedict.
Friends now fear for her mental state after her outburst, which has shocked those closest to her.
She warned of a "f ***in bloodbath" if Pope Benedict was to visit Ireland as has been mooted.
Her latest ouburst came on Twitter after a poll was carried out on whether Pope Benedict should visit Ireland.
She warned that there would be a "f **kin bloodbath". She tweeted "'Young people of Ireland I love u' said Sinead as she pulled the f ***ing trigger,"
‘Young People of Ireland I love You” is the phrase made famous by Pope John Paul 11 when he came to Ireland in 1979
Sinead also wrote; "There'd be a f**kin bloodbath. Me meet the f **ker off the plane myself," she added.
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O’Connor is infamous for tearing up a photo of Pope John Paul on Saturday Night Live in 1992 when she showed a photo of Pope John Paul II to the camera while chanting the word "evil", after which she tore the photo into pieces, and said "Fight the real enemy."
A senior bishop in the Celtic Church, who also left the priesthood and has been critical of the pope took issue with Sinead in the Evening Herald newspaper.
Antrim Bishop Pat Buckley today stated the comments were "extreme" "This is extreme language and it's very worrying," he said.
"I spoke to Sinead a while ago and she's an incredibly talented person. She's a genius in fact. But she's clearly very vulnerable. We cannot condone that type of language, they are very extreme words to use.
"I would hope that if there are people close to her, that they will support her during this time. She appears by her comments that she's near the edge."
Earlier this month O’Connor stated that she wanted to commit suicide after the breakup of her third marriage.