The Greek Singer Nana Mouskouri participated in the Eurovision Song Contest for which country?

Explanation

Nana Mouskouri (born 1943) participated for Luxembourg with the song "A Force de Prier" in 1963. She came 8th in the final, where the Danish duo Jørgen and Grethe Ingman won with the song "Dansevise". Nana Mouskouri is one of the most sold female artists worldwide. She sings music with elements of Greek folk, jazz, pop and classical music.