Miley Cyrus Vs.Sinead O'Connor

Miley Cyrus is also involved in a war of words with Irish singer Sinead O’Connor, who wrote a tough-love letter telling Cyrus she was letting herself be “prostituted” and "exploited."

"I am extremely concerned for you that those around you have led you to believe....that it is in any way 'cool' to be naked and licking sledgehammers in your videos," O’Conner wrote.

Cyrus responded with an icy tweet that compared O’Connor to troubled actress Amanda Bynes: "Before Amanda Bynes. There was..." and then she posted the notorious image of O’Connor ripping up a picture of then Pope John Paul II on Saturday Night Live.    

An incensed O’Connor responded, "When you end up in a psych ward or rehab I’ll be happy to visit you.”