Leon Kleerkoper, better known as David Alexandre Winter, is a Dutch-born singer and former DJ. Prior to the Contest, he had an established music career, achieving several hits in other European countries before he was chosen to represent Luxembourg at the 1970 Contest in Amsterdam, finishing in last place with Nul Points.
A decade later, he moved to the US where he recorded an album with a Canadian independent company Isba Records and released a single entitled "L'Étoile du Berger". He recorded a studio album "Winter Country" in Nashville, Tennessee. In 2010, Winter returned to the stage in France for a revival tour which played for 55 sold-out venues with over 550,000 people seeing him in concert.