Listen to Etham Erachu Kathu Kidapen online. Etham Erachu Kathu Kidapen is a Tamil language song and is sung by Ilaiyaraaja and S. Janaki. Etham Erachu Kathu Kidapen, from the album Old Is Gold - Rajnikanth Hits, was released in the year 2009. The duration of the song is 3:05. Download Tamil songs online from JioSaavn.