Listen to When You Are Happy And You Know It online. When You Are Happy And You Know It is an English language song and is sung by Jayeeta, Radhik Kar, Barsha Roy, Sneha Chakraborty, Debarati Chakraborty and Neepabithi. When You Are Happy And You Know It, from the album Nursery Rhymes & Popular Songs For Children, was released in the year 2002. The duration of the song is 1:26. Download English songs online from JioSaavn.