A massive Europe-wide dance flashmob was organized for this year's Eurovision Song Contest.
Eurovision is an annual competition held members of the European Broadcasting Union. Over a few days, each member country performs a song on live TV. International viewers get to vote for their favorites from the other countries.
The Contest has been broadcast since 1956 and is one of the most watched non-sporting events in the world. I wish something like Eurovision was created for dance groups, creating a World's Best Dance Crew. Thanks for the video link, Martin!