Sinead O'Connor has more words for Miley Cyrus: 'You have no business abusing Amanda Bynes'

Well it looks like this celebrity row is just getting started.

Sinead O'Connor has more words for Miley Cyrus, after the pop star responded to the singer's first open letter with, "Before Amanda Bynes.... There was…" alongside a series of tweets from O'Connor's former Twitter account.

The 47-year-old Irish singer posted a letter to Cyrus on her website earlier this week, telling the 20-year-old pop star to "respect your talent" as young artists are exploited by the music business. "I am extremely concerned for you," she wrote in her initial letter. "You will obscure your talent by allowing yourself to be pimped."

Cyrus, who didn't warm up to the formerly controversial singer's comments, lashed back and shared a photo of O'Connor's infamous moment in 1992 when the artist unceremoniously ripped an image of the Pope on Saturday Night Live. The pop star accompanied the post with the simple caption, "#SNL," then wrote in a subsequent tweet, "Sinead. I don't have time to write you an open letter cause Im hosting & performing on SNL this week."

She added, "So if youd like to meet up and talk lemme know in your next letter."

Naturally, O'Connor is fuming. On her Facebook Thursday, the Irish artist hinted at a possible lawsuit:

Ms Cyrus has today posted tweets of mine which are two years old and which were sent when I was ill and seeking medical help. She has done this in an attempt to deliberately cause me harm and hurt. I wish to confirm that I am quite well and kindly request people cease e-mailing me in the mistaken belief these are recent tweets.

Ms Cyrus' lawyers will be contacted by mine regarding this matter.

I confirm also that I do not at all support or condone the abuse or mockery of those who have been brave enough to openly discuss mental health issues. Mockery causes deaths. Period. It is an unacceptable form of bullying, no matter who it is doing the bullying.

This after O'Connor had posted her second open letter to the pop star:

You have posted today tweets of mine which are two years old, which were posted by me when I was unwell and seeking help so as to make them look like they are recent. In doing so you mock myself and Amanda Bynes for having suffered with mental health issues and for having sought help.

I mean really really… who advises you? have you any idea how stupid and dangerous it is to mock people for suffering illness? You will yourself one day suffer such illness, that is without doubt. The course you have set yourself upon can only end in that, trust me.

I am staggered that any 20 yr old woman of the 21st century could behave in such a dangerous and irresponsible manner as to not only send the signal to young women that its ok to act like prostitutes but also to the signal that those who have suffered or do suffer mental health problems are to be mocked and have their opinions invalidated.

As for when their meeting will happen, O'Connor says it won't:

I have no interest whatsoever in meeting you. 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.

You can take five minutes today between g- string f----n' changes to publicly apologise and remove your abusive tweets. If you do not then you don't give a s--- who you mock and what damage you do by being so ignorant.

When you publicly apologise 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.

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. If you cannot apologize I will have no choice but to bring legal proceedings against you since it is extremely hard to be given work when people think one is suffering from mental illness.

I have no interest in or desire to cause you trouble but if you do not apologise for having deliberately tried to cause me hurt and trouble personally and professionally I will have to bring pressure upon you.

When you end up in the psych ward or rehab I'll be happy to visit you.. and would not lower myself to mock you.

Be a proper woman and make the public apologies I have listed above. Your hosting SNL is a bulls--- reason for not taking five minutes to do the right thing and your behaviour yesterday will rebound upon you very badly.

You have no business abusing Amanda Bynes or anyone else. How do you think you made her feel yesterday? How do you feel when your friend Britney Spears is mocked and humiliated for having had mental health problems? I know I personally want to bash those who treat her that way. If she is your friend and more importantly if you are a true friend to her.. you ought apologise for joining those who mock and humiliate women who have been too nice frankly, to manage the music business without sensibly losing their minds.

Cease behaving in an anti-female capacity. You will become the victim of it shortly. Soon it will be you the media 'crazy' .. and you will not enjoy it.. and you will appreciate people (like myself) standing up for you. Which I will be happy to do.. if you earn my respect today by apologising publicly.

What are your thoughts? Should Sinead step off, or does Miley owe her an apology?