popular music, a chart-topper is an extremely popular recording, identified by its inclusion in a ranked list—a chart—of top selling or otherwise judged most popular releases. "Chart-topper" and related terms like "No. 1 hit", "top of the charts", "chart hit", and so forth, are widely used in common conversation and in marketing, and loosely defined. In North America, the weekly charts from trade publication"Billboard" magazine are most often referenced (quite often internationally, as well), particularly the Billboard Hot 100singles and Billboard 200album charts, although there are many other charts and sources. Because of its value in promoting artists and releases, both directly to the consumer, and by encouraging exposure on radio, TVand through other media, chart positioning has long been a subject of scrutiny and controversy. Chart compilation methodology and data sources vary, ranging from buzz chartsbased on opinions of various experts and tastemakers, to charts that reflect empirical data, like retailsales. Therefore, a "chart-topper" may be anything from an insiders' pick to a runaway seller. The term is also used similarly to some extent in video games.
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