Nothing Compares 2 U: the secrets of Prince's original recording, unheard until today

Who is the song about, why did Prince give it to the Family to record as an album track, and what did he really think of Sinéad O’Connor’s smash hit single? Thirty four years ago, when Paul “St Paul” Peterson was the singer in the Family, a band Prince had assembled, he was sitting in his mother’s house in Minneapolis when he received a tape containing Prince’s recording of a song he wanted Peterson to learn for the album he was producing for the group.