It's another planned sporadic Windows 7 celebration! Wow, seems so natural and unrehearsed. Let's look at the description by the person who "caught" this and posted it:
The Blackeyed Peas compel the employees at the Microsoft Store in Mission Viejo, California to break out in dance, let their hair down and have some fun. This is an amazing store, the employees seem really excited and engaged, almost happy to be at work. My favorite parts are when people walking in the mall come inside the store, join in the dancing and have some fun. The amazing thing is that people are in the store for hours, they love interacting with the software and learning about new technology.
Sure, sounds just as natural as your Windows 7 party video. People really ARE excited about computer operating systems!