Listen to Pirava Varam Tharum online. Pirava Varam Tharum is a Tamil language song and is sung by O.S.Thiagarajan. Pirava Varam Tharum, from the album O.S.Thiagarajan Classical, was released in the year 1990. The duration of the song is 5:39. Download Tamil songs online from JioSaavn.