If you've seen the animated movie Despicable 2, then the song Happy must have surely made you smile. Now, its singer Pharrell Williams makes a mark in the world of music videos by releasing the official video of the song. What makes it different? The Happy music video is 24 hours long!

Imagine spending an entire day of watching Williams' Happy song. The singer-songwriter has made the video available for live streaming via its official site 24hoursofhappy.com. According to MSN Music, the video is user controlled. It comes with an assigned clock layout that lets viewers of the video to have the option of choosing to see it either in real time or choose a particular part of the day. It also allows users to share their favorite moment through social networks like Twitter and Facebook.

The Verge adds that the video shows a variety of dancers who lip synchs Williams throughout the parts of an entire day in LA. The song that is actually just four minutes long is played on loop mode, with every cycle showing new dancers at a different place. The viewers also have the option to rewind or fast forward by clicking on the interface of the online clock. The dancers featured are mixed celebrities and unnamed extras.

The song may have very simple lyrics but the way its video was presented and made certainly made it unique, creative and lighthearted in its own right. Sydney Morning Herald even wrote that it could be the best non-medical treatment for those undergoing depression. The 24 hour video was made by We Are From LA with producer Iconoclast.

If you find some trouble viewing the stream on its official site, you can first have a quick look at it by checking out some of these videos below: