Participants included Ellen DeGeneres and James Corden, while Kylie Jenner and Cardi B made references. It first appeared on Billboard’s Kid Digital Song Sales chart in July, followed by the Streaming Songs chart in November. It also made it to the U.K. Top 40, which is not produced by Billboard, in September. But today’s charts are different, and often include an eclectic mix of music. In 2012, Billboard began counting digital sales and online streams in its singles chart, immediately lifting “Gangnam Style,” the YouTube hit by the South Korean rapper Psy, to the top of the new Rap Songs chart.

Source: New York Times January 10, 2019 09:21 UTC