Listen to Unnai Thanna Sad online. Unnai Thanna Sad is a Tamil language song and is sung by Sujatha Mohan and S.P. Eashwar. Unnai Thanna Sad, from the album Kan Thiranthu Paaramma, was released in the year 2000. The duration of the song is 4:32. Download Tamil songs online from JioSaavn.