If you thought your children were happy it was the Easter holidays they've got nothing on staff at Charlton Manor Primary - who recorded their own version of Pharrell Williams's number one smash.
Teachers, cleaners, sports coaches and cooks have all joined in with an inventive take-off of the American soul star's Happy video.
Though it might not beat the multi-million selling single, their rendition has already racked up more than 1,500 hits on the YouTube website.
A school spokesman said: "We want others to feel as happy as we do."
The school is currently trying to raise £10,000 for a community garden project - including a food growing garden and a farm shop - but they only have until May 7 to do it.