John Lennon was a founding member of the Beatles, a British rock band that formed in 1960. Lennon was a singer, songwriter, and guitarist who co-founded the group with Paul McCartney. He wrote many of the band's most popular songs, including 'Help!', 'Strawberry Fields Forever', and 'IMAGINE'. Lennon was also an activist and political figure, advocating for peace and social justice. He was assassinated in 1980.