In the second half of the 1970s, Kalatzis co-operated with composer Nikos Karvelas and in 1981 he released an album with the songs of Tolis Voskopoulos.
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His popularity began to increase and he had a productive collaboration with some of the most famous Greek composers of the period - Manos Loizos, Stavros Kougioumtzis, Giorgos Katsaros, Mimis Plessas, Giannis Spanos, and Tolis Voskopoulos.
Giannis Spanos | Giannis Dalianidis | Giannis Skarimpas | Giannis Poulopoulos | Giannis Maniatis |