The Beatles hairstyle was famously known as the 'MOP top' due to its resemblance to a MOP. This hairstyle was popularized by the British rock band The Beatles in the 1960s and has since become an iconic symbol of the era. The hairstyle consists of a fringe that is cut straight across the forehead and long hair that is combed back from the face. The MOP top hairstyle was adopted by many young people during the 1960s and has since become a classic look.