The Billboard Hot 100 chart provides a list of the 100 most popular songs per week across all genres. According to its website, Billboard calculates the most popular songs through streaming, sales, and radio airplay data.
Billboard.com also allows users to see charts of each year's most popular songs and albums since 2002. The website additionally provides similar charts for up-and-coming artists and charts organized according to genre. Each genre also has charts for more specific subcategories. For example, charts in the Rock category include Adult Alternative Songs and Hard Rock Albums. The website also offers international charts from Japan, Canada, Germany and France.