Listen to Kanna Unakku online. Kanna Unakku is a Tamil language song and is sung by Gangai Amaran, S.P. Sailaja and Latha Rajinikanth. Kanna Unakku, from the album Kaadhula Poo (Original Motion Picture Soundtrack), was released in the year 1984. The duration of the song is 4:20. Download Tamil songs online from JioSaavn.