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 Prairie" was released that featured seven Wings songs written or co-written by her. Wings also backed Paul's brother Mike McGear on the "McGear" album, as well as McGear's band the Scaffold on the single "Liverpool Lou" and its B-side "Ten Years After on Strawberry Jam". Paul McCartney also used three unreleased Wings songs as B-sides of his solo singles several years after Wings' break-up. Wings' 1977 single "Mull of Kintyre"/"Girls School" is still the biggest-selling non-charity single in the UK (although Queen's "Bohemian Rhapsody" sold more, its sales include a reissue in aid of the Terrence Higgins Trust), and it