Listen to If You're Happy and You Know It (Musicbox Version) online. If You're Happy and You Know It (Musicbox Version) is an English language song and is sung by If You're Happy And You Know It, Songs for Kids and Nursery Rhymes. If You're Happy and You Know It (Musicbox Version), from the album If You're Happy and You Know It, was released in the year 2015. The duration of the song is 1:05. Download English songs online from JioSaavn.