Quel cœur vas-tu briser was the Swiss entry in the Eurovision Song Contest 1967 in Vienna, performed by Géraldine Gaulier. The song is a ballad in which Géraldine asks a former lover whose heart he is going to break now that hers no longer beats for him. She tells him that she has forgotten him and asks him who will be the next victim of his false passions. The song was performed sixth on the night, following Portugal and preceding Sweden. At the close of voting, it received Nul Points and was placed 17th (last place).