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 peers", he continues, "what was revolutionary was the sonic carpet that enveloped the ears and sent the listener spinning into other realms." Stephen Thomas Erlewine of AllMusic considers the album to be a refinement of "Revolver"s "previously unheard-of level of sophistication and fearless experimentation" and a work that combines a wide range of musical styles yet "Not once does the diversity seem forced". He concludes: "After "Sgt. Pepper", there were no rules to follow – rock and pop bands could try anything, for better or worse." In 1987, Anthony DeCurtis of "Rolling Stone" described "Sgt. Pepper" as the album that