LONDON, Dec 21: He has the most-watched video in Youtube history, become a pop sensation with a horse-riding dance craze that has swept the world and now Korean singer Psy may cement his place in popular culture with recognition from a British dictionary. “Gangnam Style,” Psy’s signature song, has been chosen along with “fiscal cliff” and “Romneyshambles” as some of Collins Dictionary’s words of the year. (agencies)