"Sway" is a mambo-jazz adaptation of Mexican song "¿Quién será?" by Pablo Beltrán Ruiz. Norman Gimbel's English lyrics transformed it into a 1950s classic, popularized by Rosemary Clooney's smooth vocal interpretation that topped charts internationally.
"Sway" is a Latin jazz standard popularized by Perez Prado's energetic mambo arrangement. Originally a Mexican bolero titled "¿Quién será?" by Pablo Beltrán Ruiz, it gained worldwide fame with Norman Gimbel's English lyrics and Prado's big-band interpretation.