Listen to Oh Mridule Happy online. Oh Mridule Happy is a Malayalam language song and is sung by M. G. Radhakrishnan and K.J. Yesudas. Oh Mridule Happy, from the album Legends K J Yesudas Vol 5, was released in the year 2000. The duration of the song is 4:36. Download Malayalam songs online from JioSaavn.