Perfidia, A song written by Alberto Domínguez(1911–1975), a Mexican composer and arranger. The song is about love and betrayal. Aside from the original Spanish, other renditions exist, including English and instrumental versions. The English lyrics are by Milton Leeds. The song was published in 1939 and became a hit for Xavier Cugat in 1940. This version was used by director Wong Kar-wai in his films Days of Being Wild, In the Mood for Love, and 2046.
"Perfidia"' has been recorded by many artists, including Julie London, The Four Aces, Charlie Parker, Laurel Aitken, Mel Torme, Olavi Virta, Café Tacuba, Glenn Miller, Nana Mouskouri, King Tubby, Phyllis Dillon, The Shadows, The Ventures, Trini Lopez, Linda Ronstadt (in Spanish), Nat King Cole (in Spanish), Cliff Richard, Lawrence Welk, Luis Miguel, mandolinist Dave Apollon, Olivia Molina, Perez Prado, Ibrahim Ferrer, Los Rabanes, and Ben E. King.
The song is played in the film Casablanca when Ingrid Bergman and Humphrey Bogart dance in the Paris nightclub, in the flashback sequence of their romance.
The song is heard in the film The Mask of Dimitrios (1944) but the story is set in 1938 (a year before the song was published).
It also sets a romantic mood in the film Now, Voyager, with stars Bette Davis and Paul Henreid seen sitting together in a Rio de Janeiro nightclub.