[applause] Just follow my lead. If you're happy and you know it, clap your hands. If you're happy and you know it, clap your hands. If you're happy and you know it, and you really want to show it, if you're happy and you know it, clap your hands.Woo. Look at you. The moment I sang this song, every face in this room just lit up.You smiled, sir. I saw you. Everyone started clapping and you felt that there's some magic that's happening.You know why. This very old nursery rhyme has the power to make you remembe ...