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 record, unique, clever, and stunning". In "The Times", William Mann described "Sgt. Pepper" as a "pop music master-class" and wrote admiringly of its use of "vivid" bass lines that partly recalled the Alberti tradition in classical music. He also commented that, so considerable were the album's musical advances, "the only track that would have been conceivable in pop songs five years ago" was "With a Little Help from My Friends". Having been among the first British critics to fully appreciate "Revolver", Peter Clayton of "Gramophone" magazine said that the new album was "like nearly everything the Beatles do, bizarre, wonderful,