Sinad OConnor, the gifted Irish singer-songwriter who became a superstar in her mid-20s but was known as much for her private struggles and provocative actions as for her fierce and expressive music, has died at 56.

It is with great sadness that we announce the passing of our beloved Sinad. Her family and friends are devastated and have requested privacy at this very difficult time, the singer’s family said in a statement reported Wednesday by the BBC and RTE.

Recognizable by her shaved head and elfin features, OConnor began her career singing on the streets of Dublin and soon rose to international fame. She was a star from her 1987 debut album The Lion and the Cobra and became a sensation in 1990 with her cover of Princes ballad Nothing Compares 2 U, a seething, shattering performance that topped charts from Europe to Australia and was heightened by a promotional video featuring the gray-eyed OConnor in intense close-up.

Nothing Compares 2 U received three Grammy nominations and was the featured track off her acclaimed album I Do Not Want What I Haven’t Got, which helped lead Rolling Stone to name her Artist of the Year in 1991.

She proved that a recording artist could refuse to compromise and still connect with millions of listeners hungry for music of substance, the magazine declared.

She was a lifelong non-conformist she would say that she shaved her head in response to record executives pressuring her to be conventionally glamorous but her political and cultural stances and troubled private life often overshadowed her music. She feuded with Frank Sinatra over her refusal to allow the playing of The Star-Spangled Banner at one of her shows and accused Prince of physically threatening her. In 1989 she declared her support for the Irish Republican Army, a statement she retracted a year later. Around the same time, she skipped the Grammy ceremony, saying it was too commercialized.

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A critic of the Catholic Church well before allegations sexual abuse were widely reported, OConnor made headlines in October 1992 when she tore up a photo of Pope John Paul II while appearing live on NBCs Saturday Night Live and denounced the church as the enemy. The following week, Joe Pesci hosted Saturday Night Live, held up a repaired photo of the Pope and said that if he had been on the show with OConnor he would have gave her such a smack. Days later, she appeared at an all-star tribute for Bob Dylan at Madison Square Garden and was immediately booed. She was supposed to sing Dylans I Believe in You, but switched to an a cappella version of Bob Marleys War, which she had sung on Saturday Night Live.

Although consoled and encouraged on stage by her friend Kris Kristofferson, she left and broke down, and her performance was kept off the concert CD. (Years later, Kristofferson recorded Sister Sinead, for which he wrote And maybe shes crazy and maybe she aint/But so was Picasso and so were the saints.)

In 1999, OConnor caused uproar in Ireland when she became a priestess of the breakaway Latin Tridentine Church a position that was not recognized by the mainstream Catholic Church. For many years, she called for a full investigation into the extent of the churchs role in concealing child abuse by clergy. In 2010, when Pope Benedict XVI apologized to Ireland to atone for decades of abuse, OConnor condemned the apology for not going far enough and called for Catholics to boycott Mass until there was a full investigation into the Vaticans role, which by 2018 was making international headlines.

People assumed I didn’t believe in God. That’s not the case at all. I’m Catholic by birth and culture and would be the first at the church door if the Vatican offered sincere reconciliation, she wrote in the Washington Post in 2010.

O’Connor announced in 2018 that she had converted to Islam and would be adopting the name Shuhada Davitt although she continued to use Sinad OConnor professionally.

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