Sinead O' Connor is a Iris singer-songwriter.

She was born 8 December 1966 in Dublin.

After a difficult childhood, in which her parents divorced, she received violence from the mother and she has been sent to reform school, in 1984 her career as a singer starts, when she met Columb Farrelly. Together they recruited a few other members and formed a band called Ton Ton Macoute.

After the death of the mother in a car crash,in 1985, she left the band,and moved to London.

In 1987 she published her first album as single and she gained considerable attention and mostly positive reviews.

She also received the Best Female Rock Vocal Performance Grammy nomination.

With the 1990 release of O'Connor's second album, I Do Not Want What I Haven't Got, the baldheaded singer-songwriter became an international star. It contained the hit Nothing Compares 2 U, that is still nowadays one of the most famous song of the ‘90, written by Prince. Thanks to this she received Grammy nominations including Record of the Year and Best Female Pop Vocal Performance. She eventually won the Grammy for Best Alternative Music Performance, but she boycotted the award show, maintaining that her absence was a protest against the extreme commercialism of the Grammy Awards.

Her next two albums, Am I Not Your Girl? (1992) and Universal Mother (1994), made far less of an impact either critically or commercially.

Soon, however, O'Connor became famous for her controversial public outbursts, beginning in 1989 when she announced her support for the radical Irish Republican Army (IRA); she retracted the statement one year later.

Even more publicity surrounded a 1992 performance by O'Connor on Saturday Night Live, during which she tore up a photograph of Pope John Paul II, denouncing the Catholic Church as "the real enemy." Despite her contempt for the clerical hierarchy, O'Connor maintained she was a Catholic and devoutly spiritual.

In 2003, announced her retirement from music.

Her personal life was even more controversial: he married twice, once to John Reynolds, a record producer and musician and the second to journalist Nicholas Sommerlad in 2002 and she had four kids from 4 different men: the first husband, the second, a girl, by The Irish Times columnist John Waters, another son, whose father is Irish folk musician and record producer Dónal Lunny and the fourth child, from her former partner Frank Bonadio, from whom she separated in 2007.