Ioanna "Yianna" Terzi is a Greek singer and songwriter. She represented Greece in the Eurovision Song Contest 2018 with the song "Oniro mou".

Greece participated in the Eurovision Song Contest 2018 with the song "Oniro mou" written by Aris Kalimeris, Dimitris Stamatiou, Yianna Terzi and Mihalis Papathanasiou and performed by Terzi. A national final was scheduled to be held in order to select the Greek entry for the 2018 contest in Lisbon, Portugal. Five entries were to compete in the final on 22 February 2018 where public voting would exclusively select the winner, however "Oniro mou" performed by Terzi was announced as the Greek entry on 16 February 2018 following the disqualification of four out of the five national final entries.