Yesterday, the Irish singer-songwriter penned an open letter to the 20-year-old pop star in which she expressed her concern over Miley's controversial image after learning that the erstwhile Disney star wanted her "Wrecking Ball" music video to be similar to her own famous hit, "Nothing Compares 2 U."
In Sinéad's missive, the 46-year-old singer-songwriter suggested Miley is allowing herself to be "pimped" by the music industry, which then prompted the "We Can't Stop" singer to post a series of Sinéad's tweets (which the veteran claims are two years old) and compare her to Amanda Bynes.
Sinéad then wrote a second letter to Miley, calling the performer "anti-female" and "f--king stupid," to which Miley replied, "Sinead. I don't have time to write you an open letter cause Im hosting & performing on SNL this week. So if youd like to meet up and talk lemme know in your next letter. :)"
And it's safe to say Sinéad received Miley's latest memo, as she took to her Facebook page to pen a third letter (no, seriously) to the singer.
"I have no interest whatsoever in meeting you," the "Foggy Dew" crooner began. "You had plenty of time yesterday to abuse Amanda Bynes..an entirely innocent party.. and myself.. who also did nothing to deserve your abuse.. along with every other sufferer of mental health problems and every person who suffered abuse at the hands of priests," she wrote, referencing the photo Miley tweeted yesterday of Sinéad ripping up a picture of the Pope during a musical performance on Saturday Night Live years ago.
"You can take five minutes today between g- string f--kin' changes to publicly apologize and remove your abusive tweets," she added. "If you do not then you don't give a s--t who you mock and what damage you do by being so ignorant."
Sinéad continued, slamming Miley for mocking mental illness.
"When you publicly apologize to Amanda and myself and all mental health sufferers as well as all who were abused by priests that will end the matter as far as I am concerned," she wrote. "What you did yesterday was designed to damage me and my career and has caused me enormous distress and harassment and has potential to damage my career, since you deliberately gave the impression those tweets of mine were not two years old but reflect my current condition."
And then she threatened to take legal action against the former Hannah Montana star (again).