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 the act of listening, but an integral component of the listening that expanded the musical experience". The cover helped to elevate album art as a respected topic for critical analysis whereby the "structures and cultures of popular music" could henceforth justify intellectual discourse in a way that – before "Sgt. Pepper" – would have seemed like "fanciful conceit". He writes: "Sgt. Pepper" "cover has been regarded as groundbreaking in its visual and aesthetic properties, congratulated for its innovative and imaginative design, credited with providing an early impetus for the expansion of the graphic design industry into popular music, and perceived