Bipolar struggle Throughout the 1990s, Grammy-winning Irish singer Sinead O’Connor was known for her shaved head, edgy songs, and rebelliousness. In a 1992 appearance on the TV show Saturday Night Live, for example, she ripped up a picture of Pope John Paul II (left) to help bring attention to the problem of sex abuse in the Catholic church. In more recent times (right), she revealed that she has struggled with bipolar disorder, for which she receives treatment.