Listen to Radha Kathal Varadha online. Radha Kathal Varadha is a Tamil language song and is sung by M. S. Viswanathan and S.P. Balasubrahmanyam. Radha Kathal Varadha, from the album Gh - All Time Hits Kathal Mannan, was released in the year 1999. The duration of the song is 6:31. Download Tamil songs online from JioSaavn.