John Lennon was a British singer, songwriter, and one of the founding members of the Beatles. He was born in 1940 in Liverpool, England and is widely considered to be one of the most influential musicians of the 20th century. Lennon wrote many of the Beatles' most popular songs, including 'Help!', 'Strawberry Fields Forever', and 'IMAGINE'. He was also an activist for peace and human rights, and his death in 1980 was mourned around the world.