The Beatles formed in Liverpool in 1960, originally consisting of John Lennon, Paul McCartney, George Harrison, Stuart Sutcliffe, and Pete Best. After early performances in Hamburg clubs, Sutcliffe left in 1961 and Best was replaced by Ringo Starr in 1962. The classic lineup—Lennon, McCartney, Harrison, and Starr—solidified before their first recording contract.With hits like 'Please Please Me' and 'She Loves You,' Beatlemania erupted in 1963....