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.
https://en.wikipedia.org/wiki/Beatlemania