Listen to Unai Etthanai online. Unai Etthanai is a Tamil language song and is sung by K. V. Mahadevan, S.P. Balasubrahmanyam and P. Susheela. Unai Etthanai, from the album Best Of P. Susheela, was released in the year 1980. The duration of the song is 5:03. Download Tamil songs online from JioSaavn.