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 both began to cover rock music for the first time, with the latter changing its name to "Jazz & Pop" as a result. In addition, following "Sgt. Pepper", established American publications such as "Vogue", "Playboy" and the "San Francisco Chronicle" started discussing rock as art, in terms usually reserved for jazz criticism. Writing for "Rolling Stone" in 1969, Michael Lydon said that reviewers had had to invent "new criticism" to match pop's musical advances, since: "Writing had to be an appropriate response to the music; in writing about, say, "Sgt. Pepper", you had to try to write something as good