Mouth & MacNeal was a Dutch pop duo that enjoyed some commercial success in the 1970s. They are best known for their million selling recording of “How Do You Do” in 1972, which topped the Dutch chart and became a US top ten hit, and for representing the Netherlands at the 1974 Eurovision Song Contest. In December 1974, shortly after their success with “I See a Star”, Mouth and MacNeal split up. Mouth continued with Ingrid Kup (who would later become his wife) as “Big Mouth & Little Eve”, whereas MacNeal resumed her solo career. Maggie MacNeal paricipated in the Contest again in 1980. By then Mouth also was pursuing a solo career under his own name Willem Duyn. After 1992 he played in several bands.
Willem Duyn died from a heart attack on December 4, 2004 at the age of 67.