Not exactly exempt from her own issues and problems down the years, Irish singer-songwriter Sinead O’Connor has released an open letter to troubled U.S. twerk melter Miley Cyus. Written “in the spirit of motherliness and with love” O’Connor’s address to the 20-year old is based around her plea: “don’t let the music business make a prostitute of you” and draws attention to her recent Wrecking Ball video and VMA performance with the aptly-named Robin Thicke. Read the letter below. “Dear Miley, I wasn’t going to write this letter, but today i’ve been dodging phone calls from various newspapers who wished me…