Sinead O'Connor was an Irish singer-songwriter known for her powerful voice and emotive performances. She gained international fame in the late 1980s and early 1990s with her hit single "Nothing Compares 2 U," which showcased her unique style and vocal range. O'Connor's music often blended elements of rock, pop, and traditional Irish music. Throughout her career, O'Connor was also recognized for her outspoken views on various social and political issues. She was a controversial figure, particularly for her criticism of the Catholic Church and her advocacy for mental health awareness. Despite facing challenges, her influence on music and culture remains significant.