Rock musician Joan Jett is an American singer, songwriter, and guitarist. She is best known for her work with the band Joan Jett & the Blackhearts, which had a string of hits in the 1980s, including 'I Love Rock 'n' Roll' and 'Crimson and Clover'. Jett has also released several solo albums and has been involved in various other musical projects. She is considered one of the pioneers of punk rock and is an influential figure in the music industry.