Heart is an American rock band formed in the early 1970s, composed of sisters Ann and Nancy Wilson. Known for their distinctive fusion of hard rock and folk, they were among the first female-fronted rock bands to gain both critical and commercial success. Heart's signature sound is characterized by Ann's powerful vocals and Nancy's proficient guitar playing. Among their most influential works are hits like "Barracuda" and "Crazy On You", which have solidified their place in the annals of rock history.