The "Get Back" project became another problem that was dividing the Beatles. There was also trouble with Apple Corps, and personal issues between the band members. They had begun to make music apart the year before, and this increased as they stopped getting along as people. McCartney and Lennon both married their girlfriends, and lost control of their publishing company, Northern Songs. George Harrison began to play with musicians outside the Beatles. Ringo Starr started a new career as an actor in movies. The Beatles issued a new single, with the songs "The Ballad of John and Yoko" and "Old Brown Shoe". John and Paul played on the first song, and George and Ringo on the second. They had stopped working as a unit, and George Martin stopped coming to recording sessions, which he had never done before.