Listen to If You're Happy and You Know It (Children's Party Mix) online. If You're Happy and You Know It (Children's Party Mix) is an English language song and is sung by Kidstime Party Band. If You're Happy and You Know It (Children's Party Mix), from the album 50 Children's Favourites - 50 Great Songs for Kids, was released in the year 2013. The duration of the song is 0:59. Download English songs online from JioSaavn.