Formed in Liverpool in 1960, the British rock band soon emerged as a major phenomenon. ‘The Fab Four’ made up by John Lennon, Paul McCartney, George Harrison and Ringo Starr gave birth to a veritable Beatlemania that reigned worldwide with their rather romantic pop rock ballads such as Love Me Do and I Want to Hold your Hand. They popularized their mod outfits and hair do, giving a new identity to rock that until then privileged greasy hair and leather jackets. Evolving with popular taste, the Beatles delivered from the mid-1960s their finest work with iconic albums such as Sgt Pepper's Lonely Hearts Club Band and the White Album that enhanced a psychedelic style while the band’s members assumed an edgier lifestyle. Their break-up, in 1970 was at the centre of a worldwide blow reinforced by John Lennon's assassination in 1980 that achieved in turning The Beatles into an iconic and influential act. What was the ancestor of cheesy boy bands is now the embodiment of a cult rock battle with the sweet guys from Liverpool on one side and the dirty Rolling Stones on the other: the trick is to identify who the bad boys really were?