I have shared this website a few times over the years and I still love it! Its the 24 Hour Happy music video from Pharrell Williams and basically runs for 24 hours a day as the title suggests.
There are a number of celebrity cameos in the music video, including Whit Hertford (1:04am), Kelly Osbourne (1:28am), Magic Johnson (5:36am), Urijah Faber (8:36am), Sérgio Mendes (10:32am), Jimmy Kimmel (11:48am), Odd Future (1:48pm), Steve Carell (5:08pm), Jamie Foxx (5:28pm), Ana Ortiz (5:32pm), Miranda Cosgrove (5:40pm), Gavin DeGraw (5:44pm), and JoJo (6:16pm).
Pharrell Williams made the world’s first 24 hour video. You may wonder how it could possibly be done, the answer is by filming over 400 dancing extras with a steadicam across eight miles of Los Angeles over the course of eleven days!
So you can basically tune into it any time of the day and watch it – http://24hoursofhappy.com/ or go through the hourly playlist from YouTube.