Sinead writes open letter to Miley about licking sledgehammers

Sinead O'Connor is "extremely concerned" about Miley Cyrus.

The 46-year-old Irish star has warned the 'Wrecking Ball' hitmaker, who recently cited the 'Nothing Compares 2 U' singer as the inspiration for her latest music video in which she appears naked, that she is distracting people from her "obvious" talent and has urged her to be a better role model.