Listen to Koonthalile Nei Thadavi online. Koonthalile Nei Thadavi is a Tamil language song and is sung by K.J.Yesudas and S. Janaki. Koonthalile Nei Thadavi, from the album Kalyana Oorvalam, was released in the year 2009. The duration of the song is 4:00. Download Tamil songs online from JioSaavn.