It’s the smash hit song that has really captured the imaginations of a nation.
Team Great Britain’s Winter Olympians created their own video to celebrate their greatest sporting moments and a group of pensioners from a nursing home in Lincolnshire have also joined in the craze.
Even American police officers have taken to the streets to spread their own little piece of happiness.
And now children from a west Leeds school have created their own online video to the hit single Happy by Pharrell Williams.
The song’s upbeat video has spurred a number of copycat versions and youngsters from Farsley Springbank Junior School have captured their greatest classroom moments.
Year six teacher Simon Chapman said: “I watched the video from the Winter Olympics and it occurred to me that it would be something that would make a really good school video.
“I told the children I would be carrying a camera around with me and take clips of them around school just being themselves.
“We feel that our children are generally very happy and we wanted to capture that sense of happiness and fun.
“The children in school are very proud of the school and they are also aware that they are part of the community.
“They are a group of children in a school in Farsley and they represent the community of Farsley very well.”
The online video captures life in the school with children dancing in the playground along to the song which featured in the Despicable Me 2 soundtrack.
Gymnasts, football celebrations and a guest appearance from Leeds Rhinos mascot Ronnie the Rhino feature on the four-minute video.
And there are even guest appearances from Farsley’s very own Super Mario and Superman during the dancing.
The creative montage has received the thumbs up from school pupils after it was shown during a special assembly.
Mr Chapman added:“The children loved the videoing and they really enjoyed the process a lot.
“I would never even consider it going viral.
“It was just done for the children to be able to allow them to see themselves on video and get that sense of enjoyment and be themselves.”
PHARRELL’S SMASH HIT
Pharrell Williams’ hit single Happy has been named the UK’s most-streamed track of 2014 to date.
And the upbeat video has spurred a number of copycat versions including a showcase of some of the best moments by athletes from Team GB’s Winter Olympic squad in Sochi.
The American singer, songwriter and producer’s song has recently been named as the happiest song this summer by music streaming service Spotify.