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 K.J. Yesudas - Soulful Melodies, was released in the year 2005. The duration of the song is 4:36. Download Malayalam songs online from JioSaavn.