Pop Airplay

Pop Airplay (also called Mainstream Top 40, Pop Songs, and Top 40/CHR) is a 40-song music chart published weekly by Billboard Magazine that ranks the most popular songs of pop music being played on a panel of Top 40 radio stations in the United States.

Consumer researchers, Nielsen Audio (formerly Arbitron), refers to the format as contemporary hit radio (CHR).

The Top 40/Mainstream chart was compiled from airplay on radio stations playing a wide variety of music, while the Top 40/Rhythm-Crossover chart was made up from airplay on stations playing more dance and R&B music.

[2] Both charts were "born of then-new BDS electronic monitoring technology" as a more objective and precise way of measuring airplay on radio stations.

Top 40/Mainstream was published in the print edition of Billboard from its debut in October 1992 through May 1995, when both Top 40 charts were moved exclusively to Airplay Monitor, a secondary chart publication by Billboard.

[3] The first number-one song on the chart was "End of the Road" by Boyz II Men.

Songs are ranked based on its total number of spins per week.

†† Ariana Grande became the first artist to succeed herself at number one as the only act credited on both tracks.

Taylor Swift holds the record for most number-one singles with 13, spanning over 15 years between her first and last hit. [ 75 ]
With 47 weeks at number-one, Katy Perry holds the record for having spent the most weeks at the summit. [ 76 ]
Lady Gaga is the only musical artist in history to have her first six singles all reach the number-one position on this chart.