The Rolling Stone Top 100 Songs chart tracks the most popular songs of the week in the United States. Songs are ranked by Song Units, a number that combines audio streams and song sales using a custom weighting system. The chart does not include passive listening, such as terrestrial or digital radio. The Rolling Stone Top 100 is updated daily, and each week Rolling Stone finalizes and publishes an official version of the chart, covering the seven-day period ending with the previous Thursday. “Top Cities” are regions where a song is performing exceptionally well against the average song in that region. To read more about our methodology, including our weighting practices, visit our General Methodology.