Tug of War (Paul McCartney album) and lasted from 3 February to 2 March, ending with "Ebony and Ivory" and "What's That You're Doing", two songs featuring Stevie Wonder. 10cc guitarist Eric Stewart also became a frequent collaborator of McCartney's during this period. Further sessions that summer were undertaken at Martin's AIR studios at Oxford Street, London. The sessions were so productive that several of its tracks were held over for McCartney's next album, "Pipes of Peace", which followed in 1983. The rest of 1981 was spent in a quiet fashion, with McCartney and Martin touching up the album and perfecting it. In a contemporary review
Paul McCartney and Wings Level and later founded the Christian-oriented Joe English Band. Undeterred by their departure, Wings released the already-completed McCartney–Laine ballad "Mull of Kintyre", an ode to the Scottish coastal region where McCartney had made his home in the early 1970s. Its broad appeal was maximised by a pre-Christmas release. It became an international hit, dominating the charts in Britain (where it was Wings' only number 1 single), Australia and many other countries over the Christmas/New Year period. Ultimately, it became the first single to exceed sales of 2 million in the UK, eclipsing the previous all-time best-seller (the Beatles' "She Loves