Sgt. Pepper's Lonely Hearts Club Band album carried on the childhood and Liverpool theme with its circus and fairground effects, its pervading atmosphere of the traditional northern music hall that was in both its main creators' [McCartney and Lennon's] blood." "Sgt. Pepper" album cover was designed by the pop artists Peter Blake and Jann Haworth. Blake recalled of the concept: "I offered the idea that if they had just played a concert in the park, the cover could be a photograph of the group just after the concert with the crowd who had just watched the concert, watching them. If we did this by using cardboard
The Beatles the band's entourage are sometimes given the informal title of "fifth Beatle". As their enormous popularity grew into the frenzy dubbed "Beatlemania" in 1963, they acquired the nickname "the Fab Four", and by early 1964 became international stars, leading the "British Invasion" of the United States pop market. From 1965 onwards, the Beatles produced increasingly innovative recordings, including the albums "Rubber Soul" (1965), "Revolver" (1966), "Sgt. Pepper's Lonely Hearts Club Band" (1967), "The Beatles" (also known as the "White Album", 1968) and "Abbey Road" (1969). In 1968, they founded Apple Corps, a multi-armed multimedia corporation. After breaking up in 1970,