Lys Assia ( born Rosa Mina Schärer ; 3 March 1924 , in Rapperswil , Aargau , Switzerland ) is a Swiss singer who won the first Eurovision Song Contest in 1956 .
Lys Assia ( born Rosa Mina Schärer ; 3 March 1924 , Rupperswil , Aargau , Switzerland ) is a Swiss singer . She won the first Eurovision Song Contest in 1956 .