Listen to Gnabakam Illaiyo (Duet) online. Gnabakam Illaiyo (Duet) is a Tamil language song and is sung by S. Janaki and K.J. Yesudas. Gnabakam Illaiyo (Duet), from the album Vaan Meghangale, was released in the year 2013. The duration of the song is 4:09. Download Tamil songs online from JioSaavn.