Listen to Thadakku Thadakku online. Thadakku Thadakku is a Tamil language song and is sung by Hariharan, Sujatha Mohan, Vidyasagar and Yugabharathi. Thadakku Thadakku, from the album Aathi, was released in the year 2006. The duration of the song is 4:26. Download Tamil songs online from JioSaavn.