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 Beatles' "Rubber Soul" album. McCartney said he was highly impressed with the songs' "harmonic structures" and the choice of instruments used in Wilson's musical arrangements, and that these elements encouraged him to think the Beatles could "get further out" than the Beach Boys had. He added: "we were inspired by it and nicked a few ideas." According to author Kenneth Womack, the Beach Boys' subsequent release, the "Good Vibrations" single, was viewed by the Beatles and Martin as "a direct challenge" to their supremacy. McCartney identified "Pet Sounds" as his main musical inspiration for "Sgt. Pepper", although he said