The band built their reputation playing clubs in Liverpool and Hamburg over a three-year period from 1960. Manager Brian Epstein moulded them into a professional act and producer George Martin enhanced their musical potential. They gained popularity in the United Kingdom after their first modest hit, "Love Me Do", in late 1962. They acquired the nickname the "Fab Four" as Beatlemania grew in Britain over the following year, and by early 1964 they had become international stars, leading the "British Invasion" of the United States pop market. From 1965 on, the Beatles produced what many critics consider their finest material, including the innovative and widely influential albums Rubber Soul, Revolver, Sgt Pepper's Lonely Hearts Club Band, The Beatles, and Abbey Road . After their break-up in 1970, they each enjoyed successful musical careers. Lennon was shot and killed in December 1980, and Harrison died of lung cancer in November 2001. McCartney and Starr remain musically active.
They have had more number-one albums on the British charts and sold more singles in the UK than any other act. According to the RIAA, as of 2012 the Beatles have sold 177 million units in the US, more than any other artist. In 2008, the group topped Billboard