Willem Duyn, known professionally as Big Mouth, was a Dutch singer who, together with singer MacNeal, represented the Netherlands in the Eurovision Song Contest 1974 in Brighton, England with the song I See A Star, which finished in third place.
They began their career in 1971, achieving huge success. MacNeal temporarily embarked on a solo career while Big Mouth formed a new duo with a new singing partner, called "Big Mouth & Little Eve".
In the 1990s, Big Mouth joined several rock bands but in their final years they mostly played cafés and bars.
He died of a heart attack in December 2004 at the age of 67.
| Eurovision Song Contest 1974 | |||
|---|---|---|---|
| Participants | |||
 Carita •  Olivia Newton-John •  Peret •  Anne-Karine Strøm ft. Bendik Singers •  Marinella •  Poogy •  Korni •  ABBA •  Ireen Sheer •  Romuald •  Jacques Hustin •  Mouth & MacNeal •  Tina Reynolds •  Cindy & Bert •  Piera Martell •  Paulo de Carvalho •  Gigliola Cinquetti
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| Songs | |||
| Keep Me Warm • Long Live Love • Canta y sé feliz • The First Day Of Love • Krasi, thalassa kai t'agori mou • Natati La Khayay • Moja generacija • Waterloo • Bye Bye I Love You • Celui qui reste et celui qui s'en va • Fleur de liberté • I See A Star • Cross Your Heart • Die Sommermelodie • Mein Ruf nach dir • E depois do adeus • Sì
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