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
Art pop work of Warhol and artist Roy Lichtenstein, citing his ability to elevate common or hackneyed material to the level of "high art". In a move that was indicated by the Beatles, the Beach Boys, Phil Spector, and Frank Zappa, the dominant format of pop music transitioned from singles to albums, and many rock bands created works that aspired to make grand artistic statements, where art rock would flourish. Musicologist Ian Inglis writes that the cover art for the Beatles' 1967 album "Sgt. Pepper's Lonely Hearts Club Band" was "perceived as largely responsible for the connections between art and pop to