AT40 chart change from 10/21/2000 through 8/10/2001

Casey Kasem and his staff used R&R for the source of their charts from January 1989 to October 14, 2000. On October 21, 2000, AT40 switched from R&R to a chart provided by Mediabase 24/7. The Mediabase 24/7 chart appeared to have no coherent recurrent rule, and songs were removed from the chart from as high as #10. AT40 said that their new chart was better than R&R's, and that the new chart would provide a "fresher" sound since the chart supposedly moved faster. R&R staff have said that AT40 actually changed charts because Mediabase charts were available to AT40 a few days earlier, giving AT40 writers more time to prepare the show.

On August 10, 2001, R&R changed its charts to Mediabase only data as well as its recurrent rule. With the chart change, the chart was now available a few days earlier, and thus AT40 decided to go back to the chart. The 1st AT40 show that used AT40's new chart was August 18, 2001.

Here is a summary of some of the differences between R&R and AT40 during the separation:

Seven songs were on AT40 but never made R&R's Top 40:

  • Tionne "T-Boz" Watkins , "My Getaway", AT40 Peak #38, 2 weeks on chart
  • Blessid Union Of Souls, "Storybook Life", AT40 Peak #40, 1 week on chart
  • Jagged Edge, "Promise", AT40 Peak #36, 2 weeks on chart
  • Wyclef Jean, "Perfect Gentleman", AT40 Peak #36, 9 weeks on chart
  • OutKast, "So Fresh, So Clean", AT40 Peak #38, 2 weeks on chart
  • 3LW, "Playas Gon' Play", AT40 Peak #35, 3 weeks on chart
  • K-Ci & JoJo, "All The Things I Should Have Known", AT40 Peak #39, 1 week on chart

63% of all songs that debuted during the separation debuted first on AT40, then on R&R at least 1 week later.

The longest wait between a song debuting on AT40 and then R&R was 5 weeks, by American Hi-Fi's "Flavor of the Weak".

58% of all songs that fell off AT40 during the separation fell off earlier on AT40 than on R&R.

In terms of #1 songs: "Again" by Lenny Kravitz reached #1 on R&R but not on AT40, and "Survivor" by Destiny's Child reached #1 on AT40 but not R&R.

Many thanks to GordonUM from the former R&R Messagebords for compiling the above chart information.

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