James Paul McCartney (TV special) ATV network in order to settle his two-year legal dispute with Sir Lew Grade. As the owner of the network and its music publishing division – and, by extension, the Beatles' Northern Songs catalogue – Grade had objected to McCartney crediting his wife Linda as his co-writer since 1971, citing her lack of professional experience as a songwriter and musician. McCartney's commitment to the television project allowed him to retain the second composer's publishing royalties, which otherwise would have been assigned to Grade's company. "James Paul McCartney" was McCartney's first such special since the Beatles' 1967 television film "Magical Mystery
Paul McCartney in 1968, the two got into an argument over McCartney's critique of Starr's drum part for "Back in the U.S.S.R.", which contributed to Starr temporarily leaving the band. Starr later commented on working with McCartney: "Paul is the greatest bass player in the world. But he is also very determined ... [to] get his own way ... [thus] musical disagreements inevitably arose from time to time." McCartney and Starr collaborated on several post-Beatles projects starting in 1973, when McCartney contributed instrumentation and backing vocals for "Six O'Clock", a song McCartney wrote for Starr's album "Ringo". McCartney played a kazoo solo