 Their first appearance on "The Ed Sullivan Show" on 9 February 1964, drawing an estimated 73 million viewers (at the time a record for an American television program) is often considered a milestone in American pop culture.During the week of 4 April 1964, the Beatles held 12 positions on the "Billboard" Hot 100 singles chart, including the entire top five.The Beatles went on to become the biggest selling rock band of all time and they were followed into the US charts by numerous British bands.