Pop music is a cutthroat business that relies on strong rhythms and beats, with words following the beat. Artists often use sample beats for inspiration, and must move with the times to have a catchy "hook" that sticks in audiences' heads. Since the 1960s, many artists have written their own songs, whereas before the mid-1960s record labels would write singles and match them to artists. Songwriters need skills to work instantly with different artists and genres. The Beatles were the first artists to write their own songs.