Although Clark had become a fixture on the upper realms of the U.S. charts through her collaboration with writer/producer Tony Hatch on "Downtown", her UK singles chart success had been more hit-and-miss. The two singles before "This Is My Song", "Who Am I?" and "Colour My World", had failed to reach the UK Top 50. This made the strong UK showing of "This Is My Song"—Clark's first single release since "Downtown" to be neither written nor produced by Hatch—the more remarkable.