Joan Jett is an American rock singer, songwriter, composer, musician, record producer and occasional actress. Jett is best known for her work as the frontwoman of her band, Joan Jett& the Blackhearts, and for earlier founding and performing with the Runaways, which recorded and released the hit song "Cherry Bomb". The Blackhearts' version of the song "I Love Rock 'n Roll" was number-one on the Billboard Hot 100 for seven weeks in 1982.