Due to the country 's very small size , all Monaco 's entrants came from outside the principality . The large majority of them were French , with also one Yugoslavian , Tereza Kesovija , and one Italian , Mary Christy . Several singers selected to represent Monaco are key figures of the French scene , such as Françoise Hardy and Michèle Torr . Luxembourg , another small country , also sent a great number of French artists to the contest . At the 1967 contest , the Monegasque entry , " Boum Badaboum " , sung by Minouche Barelli , was written by Serge Gainsbourg . He had already composed the winning entry in 1965 , " Poupée de cire , poupée de son " , sung by France Gall for Luxembourg . Jean Jacques , who represented Monaco in 1969 , was the first child to take part in Eurovision . He was 12
1967 contest
Eurovision Song Contest 1967
Monaco in the Eurovision Song Contest