Annie Lennox believes certain performances and music videos should come with an X-rated warning in order to protect young children.

The singer says she has nothing against young performers getting sexual on stage and online; however, she urges stars to think about their young fans before releasing certain material so openly.

She posted on Facebook: "There is absolutely nothing 'wrong' about our sexuality or sensuality per se. But if a performing artist has an audience of impressionable young fans and they want to present a soft porn video or highly sexualised live performance, then it needs to qualify as such and be X rated for adults only. I'm talking from the perspective of the parents of those young fans. The whole thing is about their children's protection."

Her comments come just days after Irish singer Sinead O'Connor warned Miley Cyrus not to prostitute herself for the music industry.

On Saturday, Lennox wrote: "I have to say that I'm disturbed and dismayed by the recent spate of overtly sexualized performances and videos. You know the ones I'm talking about."

Cyrus has been making headlines recently for her racy performance at the MTV Video Music Awards as well as getting naked and licking a sledgehammer in her latest video, "Wrecking Ball."

Lennox added: "I believe in freedom of speech and expression, but the market forces don't give a toss about the notion of boundaries. As long as there's booty to make money out of, it will be bought and sold. It's depressing to see how these performers are so eager to push this new level of low.

"Their assumption seems to be that misogyny- utilised and displayed through oneself is totally fine, as long as you are the one creating it. As if it's all justified by how many millions of dollars and U tube hits you get from behaving like pimp and prostitute at the same time. It's a glorified and monetized form of self harm. It's a glorified and monetized form of self harm."

Cyrus performing on the "Today" show on Monday morning: