Paul McCartney February 1967, and the LP followed in June. McCartney's "She's Leaving Home" was an orchestral pop song. MacDonald described the track as "[among] the finest work on "Sgt. Pepper"—imperishable popular art of its time". Based on an ink drawing by McCartney, the LP's cover included a collage designed by pop artists Peter Blake and Jann Haworth, featuring the Beatles in costume as the Sgt. Pepper's Lonely Hearts Club Band, standing with a host of celebrities. The heavy moustaches worn by the Beatles reflected the growing influence of hippie style trends on the band, while their clothing "spoofed the vogue in
Sgt. Pepper's Lonely Hearts Club Band that point." Harrison added that, having enjoyed recording "Rubber Soul" and "Revolver", he disliked how the group's approach on "Sgt. Pepper" became "an assembly process" whereby, "A lot of the time it ended up with just Paul playing the piano and Ringo keeping the tempo, and we weren't allowed to play as a band as much." After finishing "Sgt. Pepper", the Beatles took an acetate disc of the album to the American singer Cass Elliot's flat off King's Road in Chelsea, where at six in the morning they played it at full volume with speakers set in open window frames.