Luis Demetrio

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Luis Demetrio, born Luis Demetrio Traconis Molina (April 21, 1931 – December 17, 2007), was a Mexican singer and composer. He is best known for composing the Spanish-language 1953 pop standard "¿Quién será?" and its English-language counterpart "Sway" together with Mexican bandleader Pablo Beltrán Ruiz and lyricist Norman Gimbel. The song became an international hit and was covered by Dean Martin in 1954 and by Bobby Rydell in 1960.