Ioanna Fassou Kalpaxi (Greek: Ιωάννα Φάσσου Καλπαξή; born 14 November 1938), known professionally as Yovanna, is a Greek singer, novelist and poet known for her participation in the 1965 Eurovision Song Contest representing Switzerland. At about that time Yovanna began collaborating with the Radio of Geneva, Switzerland, and as its representative, she gave concerts named "Musique aux Champs-Élysées" at many concert halls all over Europe (France, Italy, Switzerland, Germany, Belgium).