Listen to Pottu Vachi online. Pottu Vachi is a Tamil language song and is sung by Ilaiyaraaja and S.P. Balasubrahmanyam. Pottu Vachi, from the album Therkkathi Kallan (Original Motion Picture Soundtrack), was released in the year 1988. The duration of the song is 4:33. Download Tamil songs online from JioSaavn.