Listen to Unnai Naan (Sad Version) online. Unnai Naan (Sad Version) is a Tamil language song and is sung by Unnikrishanan and K.S. Chitra. Unnai Naan (Sad Version), from the album Ilaya Ragam, was released in the year 2017. The duration of the song is 5:08. Download Tamil songs online from JioSaavn.