'Step Up Revolution' Kicks Off a Global Flash Mob

The hottest dance movie, Step Up Revolution, is out in theaters today. But before you head out to watch it, you've got to take a glimpse at this Step Up Revolution flash mob video. It's a global flash mob featuring 300 dancers from 25 countries performing four dances demonstrated by the stars and choreographers of the flick.

Watching this video got us thinking, what other awesome flash mobs have been done before? Watch the Step Up Revolution video, followed by 10 of the coolest flash mob viral videos we've ever seen: