How do I know when my ears are happy? Cause I hear my favorite song My feet start tapping and I start clapping And I want to sing along Let's clap if you're happy Let's clap if you're happy Let's clap if you're happy Let's clap if you're happy How do I know when my fingers are happy? Cause they wiggle up in the air They wiggle to the sky, they wiggle to the ground They wiggle just anywhere! Let's wiggle, if you're happy Let's wiggle, if you're happy Let's wiggle, if you're happy Let's wiggle, if you're happy How do I know when my teeth are happy? Cause I smile bright and wide You can see me giggle, you can see me laugh My teeth don't wanna hide! Let's laugh, if you're happy Let's laugh if you're happy Let's laugh, if you're happy Let's laugh if you're happy How do I know when my heart is happy? Cause it beats like a little drum It makes me dance; it makes me jump I'm having so much fun! Let's dance if you're happy Let's dance if you're happy Let's dance if you're happy Let's dance if you're happy How do I know if my hips are happy? Cause they want to do the twist They twist to the left. They twist to the right Yes. You can twist like this! Let's twist if you're happy Let's twist if you're happy Let's twist if you're happy Let's twist if you're happy You are happy happy happy You are happy happy happy You are happy! You're happy! You are happy happy happy You are happy happy happy You are happy happy happy You're happy!