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1. Sinéad O'Connor began her musical journey in a home for juvenile delinquents, where a nun gifted her a guitar.

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2. She was discovered by U2's guitarist, The Edge, a turning point in her musical career.

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3. O'Connor rejected four Grammy nominations for her album "I Do Not Want What I Haven't Got", decrying them as too commercial and harmful to humanity.

4. She was banned from a New Jersey arena for refusing to sing "The Star-Spangled Banner" due to its glorifying violence.

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5. In 1992, she used her SNL performance as a platform to protest against racism and child abuse, causing a media frenzy.

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6. She ripped up a photo of then-Pope John Paul II on live television as a protest against abuse in the Catholic church, a move that was heavily criticized 

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7. Despite the media backlash, O'Connor stated she knew the consequences and was prepared for them, prioritizing what she called the "Holy Spirit". 

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8. Often called "rock music's Joan of Arc," O'Connor's beliefs and convictions were known to fluctuate.

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9. She got ordained as a Catholic priest by a fringe sect and later converted to Islam.

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10. Despite her conversion, she continued to release music under her birth name, Sinéad O'Connor.

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11. Her musical style varied wildly, spanning genres from New Age to opera to reggae. 

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12. Tabloids kept a keen eye on her personal life, including her four marriages, four divorces, and four children.

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13. O'Connor publicly shared about her struggles with mental health and multiple suicide attempts on social media platforms.

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14. One of the recurring songs from O'Connor's first album, if you grew up in the 1980s, was "Never Gets Old".

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15. After her death at 56, the Prime Minister of Ireland acknowledged her global impact and expressed condolences, recognizing her unique talent and music.