Listen to Onnum Onnum online. Onnum Onnum is a Tamil language song and is sung by Vairamuthu, Vidyasagar, Arun Mozhi and Swarnalatha. Onnum Onnum, from the album Nilaave Vaa, was released in the year 1998. The duration of the song is 3:49. Download Tamil songs online from JioSaavn.