The Beatles' style affected music and the broader culture. Their trademark moptops not only made possible the Ramones' bowl cuts, Justin Bieber's combover, and an entire decade of hair metal, but it gave the Sixties its most iconic image: long hair. Thanks to the Beatles, follicle freedom soon flowed from the ports of Liverpool to the parks of San Francisco to the lights of Broadway in the form of a smash musical, naturally entitled Hair.

Source: CBS