Chart Criteria
There are 40 positions on this chart and it is solely based on radio airplay. This chart ranks the week's hottest pop songs, ranked by mainstream top 40 radio airplay detections as measured by Nielsen BDS Nielsen Broadcast Data Systems. Songs are ranked by the total number of spins detected per week.
Songs that are gaining plays or remaining flat from previous week will receive a bullet. A song will also receive a bullet if its percentage loss in plays does not exceed the percentage of monitored station downtime for the format. If two songs are tied in total plays, the song with the larger increase in plays is placed first. In the week December 3, 2005 songs below No. 20 are moved to recurrent after 20 weeks on the chart. Descending songs below No. 10 are moved to recurrent after 52 weeks on the chart.
Read more about this topic: Mainstream Top 40 (Pop Songs)
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