Miley slams Sinead

Miley Cyrus has slammed Sinead O'Connor for accusing her of letting the music industry "prostitute" her.

The 20-year-old singer wasn't impressed by an open letter published on the Irish hitmaker's website this week and responded on Twitter by comparing Sinead to former child actress Amanda Bynes, who was admitted to a psychiatric hospital earlier this year after a series of outbursts.

"Before Amanda Bynes.... There was....," Miley wrote.

The We Can't Stop singer's tweet was accompanied by a screen grab of several messages posted from the unverified account @vampyahslayah, formerly attributed to Sinead, in which the user wrote of needing psychiatric help.

Miley's attack followed a scathing open letter penned by the 46-year-old star, who referenced a Rolling Stone interview in which the pop singer said that her Wrecking Ball video was inspired by Sinead's promo for her 1990 hit Nothing Compares 2 U.

"I am happy to hear I am somewhat of a role model for you, and I hope that because of that you will pay close attention to what I am telling you," Sinead wrote on her website.

"I am extremely concerned for you that those around you have led you to believe, or encouraged you in your own belief, that it is in any way 'cool' to be naked and licking sledgehammers in your videos. It is in fact the case that you will obscure your talent by allowing yourself to be pimped, whether it's the music business or yourself doing the pimping."

The mother-of-four does commend Miley for her talent but voiced concern she's allowing herself to be "exploited" by the music industry. She asked that Miley consider the message she's sending to young girls.

"Nothing but harm will come in the long run, from allowing yourself to be exploited. and it is absolutely NOT in ANY way an empowerment of yourself or any other young women, for you to send across the message that you are to be valued (even by you) more for your sexual appeal than your obvious talent. Yes, I'm suggesting you don't care for yourself. That has to change," she continued.

"You are worth more than your body or your sexual appeal. You have enough talent that you don't need to let the music business make a prostitute of you.

"Whether we like it or not, us females in the industry are role models and as such we have to be extremely careful what messages we send to other women. The message you keep sending is that it's somehow cool to be prostituted. it's so not cool Miley. it's dangerous."

Miley will soon have a more formal platform to address Sinead's concerns. The singer is scheduled to give her first post-VMAs interview with America's Today show on October 7.