Murray Kaufman, professionally known as Murray the K, was an influential New York City rock and roll impresario and disc jockey of the 1950s, '60s and '70s. During the early days of Beatlemania, he frequently referred to himself as the fifth Beatle.

Beatlemania was the fanaticism surrounding the English rock band the Beatles from 1963 to 1966. The group's popularity grew in the United Kingdom in late 1963, propelled by the singles "Please Please Me", "From Me to You" and "She Loves You". By October, the British press adopted the term "Beatlemania" to describe the scenes of adulation that attended the band's concert performances. By 22 February 1964, the Beatles held both the number one and number two spots on the Billboard Hot 100, with "I Want to Hold Your Hand" and "She Loves You", respectively. Their world tours were characterised by the same levels of hysteria and high-pitched screaming by female fans, both at concerts and during the group's travels between venues. Commentators likened the intensity of this adulation to a religious fervour and to a female masturbation fantasy. Among the displays of deity-like worship, fans would approach the band in the belief that they possessed supernatural healing powers.