On June 22, 1963, at the instigation of French radio station Europe 1 and French variety pop music program broadcast « Salut les copains », Johnny Hallyday and the « yé-yé generation » gather 250.000 fans for a concert in Place de la Nation in Paris. A lively as well as unexpected world first. Later that same year, on August 28, Bob Dylan and Joan Baez sing their protest songs in front of 250.000 people during the Civil Rights March in Washington, D.C. In the West, the baby boom generation comes into play, youth become fully-fledged social actors. During the Sixties, California gave birth to the student protest movement, the hippie utopia and the psychedelic counterculture, where music, drugs and free love played an important role. That is also where great music gatherings emerged in their modern form, thanks especially to Bill Graham. From the « Summer of Love » in 67 to Woodstock in 69, it is the time of hippie music festivals, precarious and economically non-viable. The Seventies promoted an essential new venue for all modern societies: the stadium, the temple of mass sporting gatherings, as well as political and musical. Stadiums allow famous artists to organize large-scale world tours, thus transforming the economics of pop music: given the record industry crisis, live concerts became the driving force of the music industry. Nowadays, giant stadium concerts, promotional as well as benefit, are a given throughout the entire world. Just like Korean pop singer Psy, who was discovered on the Internet and filled Seoul's biggest stadium for the release of his latest music video.