Pop 100 Airplay
The Pop 100 Airplay is a chart created in 2005 and released weekly by Billboard in the United States. It measures mainstream radio airplay, and is one of the three component charts, along with the Hot 100 Singles Sales and Hot Digital Songs charts, that determine the chart positions of singles on the Pop 100 chart.
The Pop 100 Airplay is often mistaken and confused with the Top 40 Mainstream chart. The Top 40 Mainstream chart and the Pop 100 Airplay both measure airplay of songs on mainstream radio stations playing pop-oriented music, but the Pop 100 Airplay (like the Hot 100 Airplay) measures airplay based on statistical audience impressions, while the Top 40 Mainstream uses the number of total detections. The Pop 100 Airplay replaced the now defunct Top 40 Tracks chart.
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