Pharrell Williams debuts 24-hour video for 'Happy'

Pharrell Williams has debuted the world's first 24-hour video for "Happy".

The video for "Happy" at 24hoursofhappy.com corresponds to the local time of the viewer, but you can rewind and fast forward to any time you want.

This is so cool! The song can literally play forever!

The video features a lot of guests including Tyler, the Creator, Steve Martin, Steve Carell and Minions!!!

Here's a 4-hour clip: