Nina Simone was an American singer, songwriter, musician, arranger, and civil rights activist. She was a classically trained pianist who spanned a variety of musical styles including classical, jazz, blues, folk, R&B, gospel, and pop. Her singing style was characterized by her soulful, powerful voice and passionate delivery. She was a prominent figure in the Civil Rights Movement and is remembered for her iconic songs such as 'Mississippi Goddam' and 'I Wish I Knew How It Would Feel to Be Free'.