THIS is the very definition of 'Happy'

Today is the United Nations International Day of Happiness, which is convenient because we think we’ve uncovered the true definition of the word ‘happy‘ – and here it is.

If this footage of The Detroit Academy of Arts and Sciences’ student choir performing Pharrell Williams’ clap-tastic tune Happy doesn’t put a grin on your face, we’re not sure what will. Their voices are impressive, their choreography is adorable, and their enthusiasm is infectious.

Be prepared to find yourself toe-tappin’ along and generally feeling like a room without a roof (whatever that means).

In the words of Pharrell himself, what does ‘happiness’ mean to you?