Turkish pop icon Sezen Aksu met Onno Tunç and started taking lessons from Tunç after listening Nükhet Duru's song called "Seninle", which was composed by Tunç in 1981. Later, they started working together during Aksu's show at Şan Theater. After being the music director of Nilüfer'84 album, he worked only with Sezen Aksu and her orchestra for many years. The composition and arrangement of many songs written by Sezen Aksu and Aysel Gürel from the album Sen Ağlama in 1984 to the album Gülümse in 1991 was directed by Onno Tunç. The album, Sen Ağlama, triggered the rise of Turkish pop music and led to the emergence of pop music as a strong rival to Turkish Arabesque music that was monopolized in the period.