Listen to If You're Happy & You Know It online. If You're Happy & You Know It is an English language song and is sung by Peter and John. If You're Happy & You Know It, from the album Worlds Greatest Nursery Rhymes & Songs - The Only Nursery Rhyme Album You'll Ever Need ! (Perfect Music for Toddlers, Babies, Parties & Sleeping), was released in the year 2015. The duration of the song is 1:30. Download English songs online from JioSaavn.