On September 30, 1961, John Lennon and Paul McCartney left Liverpool for Spain, using the birthday money John had received from a relative; they hitchhiked, wearing bowler hats as a visual cue to get cars to stop. Upon arriving in Paris, their plans changed: tired from the trip and enchanted by the city, they decided to stay instead of continuing on to Spain. They walked around Montmartre, frequented cafés, and ran into their German friend Jürgen Vollmer, whom they had known from their time in Hamburg; they liked his slicked-back hairstyle so much that they asked him to cut their hair the same way. Thus was born the distinctive “mop-top,” the hairstyle that would later become globally associated with the Beatles. John also turned 21 during that same stay in Paris, on October 9, 1961, while still with Paul.