Look out! The claws have been sharpened and this girl fight is now full blown.

Sinead O’Connor has responded to Miley Cyrus's response to her open letter, triggering a full-blown war of words.

Sinead wrote a second open letter, slamming Miley and vowing to get her attorney involved. After Miley compared Sinead to Amanda Bynes, Sinead struck back with, "Miley… Really? Who the [bleep] is advising you? Because taking me on is even more [bleepin'] stupid than behaving like a prostitute and calling it feminism."

Sinead had a big issue with Miley posting old tweets from Sinead in which she asked for help finding mental health care. Sinead wrote, "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."

Miley was responding to Sinead's original letter, in which Sinead advised Miley not to let herself be "prostituted" by the music industry by "exploiting" her "sexual appeal."

Sinead goes on to demand an apology, and suggests that Miley "could really do with educating yourself, that is if you’re not too busy getting your [upper lady parts] out to read."

You might remember how well Sinead’s career was going until she famously ripped up a photo of the Pope and pretty much found herself blacklisted by fans and the music industry alike, so it makes sense she was trying to look out for Miley, but it doesn't appear Miley understood Sinead's letter was to help, not hurt.