Yesterday, equally controversial singer songwriter Sinéad O'Connor, well known for (other than her music) ripping up a photo of John Paul II on Saturday Night Live in 1992 as a protest against the Catholic Church, penned an open letter to Miley Cyrus warning her of how easy it is to be manipulated by the music industry and "pimped" to their whims. Cyrus responded to her sincere and reasonable letter with a less than tasteful jab at O'Connor's mental health, not quite the response anyone was expecting.

This morning, open letter aficionado, Amanda Palmer has weighed in with what must be her twentieth open letter this year. Directed at O'Connor, Palmer stages a defence of Cyrus, stating that she is in control, not the music industry, and that times are ultimately a bit different to what O'Connor was making headlines. It's a pretty long letter but it is still a more rational response than Cyrus' poor taste Twitter response.

You can read the letter over at Palmer's blog.

Update: Sinead O’Connor has responded to Miley Cyrus' tweets on her Facebook page