covers of their songs WABC oldies filler 1965 North American tour 1 Shea Stadium
Their musical innovations and commercial success inspired musicians worldwide. Many artists have acknowledged the Beatles' influence and enjoyed chart success with covers of their songs. On radio, their arrival marked the beginning of a new era; in 1968 the programme director of New York's WABC radio station forbade his DJs from playing any "pre-Beatles" music, marking the defining line of what would be considered oldies on American radio. They helped to redefine the album as something more than just a few hits padded out with "filler", and they were primary innovators of the modern music video. The Shea Stadium show with which they opened their 1965 North American tour attracted an estimated 55,600 people, then the largest audience in concert history; Spitz describes the event as a "major breakthrough ... a giant step toward reshaping the concert business". Emulation of their clothing and especially their hairstyles, which became a mark of rebellion, had a global impact on fashion.
