Unless you've been living under a rock/on Pluto/on a desert island (delete as applicable) for the last few months you'll be aware of a rather popular little ditty by the name of 'Gangnam Style'.
There has literally been no escape from the song, its owner (Korean pop star Psy) or that dance.
And us mere mortals aren't the only ones who've been caught up in the dance craze either. Quite a few celebs including One Direction, Madonna, Britney and Hugh Jackman have also been unable to resist getting involved and (even better) they've all been caught on camera doing it, too.
Britney Spears and Ellen DeGeneres
Elmo and Mario Lopez