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Kostas Hatzis (Greek: Κώστας Χατζής) (born August 13, 1936) is a Greek Roma singer-songwriter and musician.

Kostas Hatzis born in Livadeia, a city in central Greece. He is one of the most significant composers in the Greek social song. He is the one who has substantially imposed the "voice-guitar" style, and for the first time he made ballads with social messages heard.[1]

His grand-father was a great popular clarinettist, and his father also played very well the dulcimer. Therefore, it didn't take Kostas Hatzis long to follow his family's steps. When he was sixteen years old, his father used to take him with him and he sang in weddings and christenings and in any other event, in which demotic, mainly, music was necessary. After a five year itinerancy in the country, he moved to Athens in 1957, and started recording in 1961, while he became popular until the mid-1960s with the Greek New Wave movement in Greek music.[1]

His talent is quickly discovered by the great composers of that time (such as Mikis Theodorakis, Manos Hadjidakis, Mimis Plessas, Stavros Xarchakos, Yannis Markopoulos etc.), with whom he has cooperated, and he has performed their songs in his own particular way, adding strongly his personal style and particular sensibility, which add melody and meaning in the lyrics of the songs.

At the end of that decade, Kostas Hatzis, in one of his tours, visits United States for concerts to the expatriate Greeks. It is worth noting that his fame as a singer for the peace has reached the White House and the then US President, Jimmy Carter invites him to meet him and congratulate him. He is one of the only Greek artists who have been invited and congratulated for their morality and their work by a US President.[2]

Kostas Hatzis has sung about love as well as social issues in duets with well known singers, such as Marinella. Kostas Hatzis is the father of young singer Alexandros Hatzis.[1]
Discography

1964: Yannis Markopoulos - To Koritsi Me To Kordelaki (Collaboration)
1966: O Kostas Hatzis tTagouda Miki Theodoraki
1966: O Kostas Hatzis Pezi Ke Tragouda Mazi Sas
1966: O Kostas Hatzis Tragouda Theodoraki, Hadjidaki, Markopoulo
1968: Kostas Hatzis - Anagennisis Alonnisos
1969: Kostas Hatzis - Stis Gitonies Tou Kosmou
1970: O Kostas Hatzis Tragouda Kosta Hatzi
1971: Ena Karavi Gemato Tragoudia (Collaboration)
1972: Mia vradia Stou Kosta Hatzi
1972: Kostas Hatzis - Petra Ke Fos
1973: Kostas Hatzis - Ouai
1975: Kostas Hatzis - Dekatria Tragoudia
1975: Kostas Hatzis - O Yios Tis Anixis
1976: Kostas Hatzis - Anthropina Systimata
1976: Marinella & Kostas Hatzis - Recital
1977: Elpida - Dakis Stou Kosta Hatzi
1979: 18 Chronia Kostas Hatzis - Thymithite Mazi Mou (Compilation)
1980: Kostas Hatzis - Portraito (Compilation)
1980: Marinella & Kostas Hatzis - To Tam-Tam
1982: Kostas Hatzis - Ntaoulierika
1983: Kostas Hatzis - Ta Stigmata Tou Kerou
1984: O Kostas Hatzis Zontana Ston Orfea
1985: Marinella - I Agapi Mas (Collaboration)
1987: Marinella & Kostas Hatzis - Synantisi
1989: Kostas Hatzis - '89
1990: Kostas Hatzis - Se 4/4
1990: Kostas Hatzis - Mousiki Ierosylia
1990: Kostas Hatzis - Rom Agapi Mou
1991: I Alexiou Tragoudaei Hatzi
1991: Kostas Hatzis - Ora Miden (4 Tragoudia Gia Tin Eirini)
1994: O Alexandros Tragouda Kosta Hatzi
1995: 30 Chronia Kostas Hatzis Vol. I & II
1995: Kostas Hatzis - Tragoudia Gia Filous
1995: Kostas Hatzis - Ta Prota mou Tragoudia
1996: Kostas Hatzis - Ikones Tou Simera
1996: Kostas Hatzis - Mia Vradia Ston Topo Pou Gennithika
1997: Marinella & Kostas Hatzis - Resital Gia Dio (Compilation)
1998: Kostas Hatzis - Ta Vradia Pou Onirevonte I Tsiggani
2000: Kostas Hatzis - Choris Esena
2000: Kostas Hatzis - Stigmes Monaxias
2002: Mimis Plessas - Iobilaion (Collaboration)
2004: Antonis Remos - Live (Collaboration)
2005: Kostas Hatzis - Live 1965 - 1979 (Compilation)
2007: Kostas Hatzis - Megales Epitihies (Compilation)
2007: 45 Chronia Kostas Hatzis - Anthologia 1961 - 2006 (Compilation)
2008: Kostas Hatzis
2009: Kostas Hatzis & Julie Massino & Alexandros Hatzis - Antitheseis