Sinéad O'Connor's music is characterized by her powerful voice and emotional depth. She gained international fame with her hit single "Nothing Compares 2 U," which showcased her ability to convey vulnerability and strength. Her style blends elements of rock, folk, and Irish traditional music, often featuring poignant lyrics that address themes of love, loss, and social issues. Throughout her career, O'Connor released several albums, including "The Lion and the Cobra" and "I Do Not Want What I Haven't Got." She was known for her bold artistic choices and willingness to tackle controversial subjects, making her a significant figure in the music industry.