James McCartney collaborated with Sean Lennon, John Lennon's youngest son. The two artists unveiled a new single on April 12, entitled Primrose Hill.

They took the opportunity to organize a competition allowing some of their admirers to appear in the future music video for the song. James McCartney has already worked on two albums with his father, notably. Flaming Pie and Driving Rain. He then went solo and released three albums, including. The Beatles' "The Beatles" (1967) and "A Farewell to Arms' (1970). The collaboration between the sons of the two Beatles singers is therefore a great first. The song has the feel of some songs released by the Beatles years before. But it is also and above all the story of an old memory of James McCartney. "As a child, I had a vision in Scotland, on a beautiful summer day. By letting go, I saw my true love and my savior in the eyes of my mind," he said.