Kathy Kirby was an English singer. She is best known for her cover version of Doris Day's "Secret Love" and for representing the United Kingdom in the 1965 Eurovision Song Contest where she finished in second place. Her popularity peaked in the 1960s, when she was one of the best-known and most-recognised personalities in British show business.

"Secret Love" is a song composed by Sammy Fain (music) and Paul Francis Webster (lyrics) for Calamity Jane, a 1953 musical film in which it was introduced by Doris Day in the title role. Ranked as a number 1 hit for Day on both the Billboard and Cash Box, the song also afforded Day a number 1 hit in the UK. "Secret Love" has subsequently been recorded by a wide range of artists, becoming a C&W hit firstly for Slim Whitman and later for Freddy Fender, with the song also becoming an R&B hit for Billy Stewart, whose version also reached the top 40 as did Freddy Fender's. In the UK, "Secret Love" would become the career record of Kathy Kirby via her 1963 remake of the song. The melody bears a slight resemblance to the opening theme of Schubert's A-major piano sonata, D.664.