Decca, but still owed them a Jagger/Richards–credited single. To get back at the label and fulfil their final contractual obligation, the band came up with the track "Schoolboy Blues"—deliberately making it as crude as they could in hopes of making it unreleasable. Amid contractual disputes with Klein, they formed their own record company, Rolling Stones Records. Sticky Fingers, released in March 1971, the band's first album on their own label, featured an elaborate cover designed by Andy Warhol. It was an Andy Warhol photograph of a man from the waist down in tight jeans featuring a functioning zipper. When unzipped, it revealed the subject's underwear. In some markets an alternate cover was released because of the perceived offensive nature of the original at the time. Sticky Fingers cover was the first to feature the logo of Rolling Stones Records, which effectively became the band's logo. It consisted of a pair of lips with a lapping tongue. Designer John Pasche created the logo, following a suggestion by Jagger to copy the stuck-out tongue of the Hindu goddess Kali. Critic Sean Egan has said of the logo, The tongue and lips design was part of a package that in 2003 VH1 named the best album cover ever. The logo has remained on all the Stones' post-1970 albums and singles, in addition to their merchandise and stage sets. The album contains one of their best-known hits, "Brown Sugar", and the country-influenced "Dead Flowers". "Brown Sugar" and "Wild Horses" were recorded at Alabama's Muscle Shoals Sound Studio after the 1969 American tour. The album continued the band's immersion into heavily blues-influenced compositions; is noted for its "loose, ramshackle ambience"; and marked Mick Taylor's first full album with the band. Sticky Fingers reached number 1 in both the UK and the US. In 1968, the Stones, acting on a suggestion by pianist Ian Stewart, put a control room in a van and created the Rolling Stones Mobile Studio so they would not be limited to the standard 9–5 operating hours of most recording studios. The band lent the mobile studio to other artists, including Led Zeppelin, who used it to record Led Zeppelin III (1970) and Led Zeppelin IV (1971). Deep Purple immortalised the mobile studio itself in the song "Smoke on the Water" with the line "the Rolling truck Stones thing just outside, making our music there". Following the release of Sticky Fingers, the