Hundreds of people, including groups of dancers from around the world, gathered in the streets of Seoul on Tuesday to dance Gangnam Style.
The participants danced and marched through a busy street in the South Korean capital.
Several teams showed the crowd their country's traditional dances as well as Gangnam Style.
Twenty three groups from South Korea, France, Poland, Netherlands, Costa Rica, Malaysia and Russia participated in the dance competition.
Victor Peeters, 19, a dancer from Netherlands said: "The Gangnam Style is really a funny dance. It's also very popular in Holland where I am from.
"So, we knew the dance, and we knew some of the steps. We did them, and then, they taught us some more moves here. So we really enjoyed dancing Gangnam Style."