Baauer leads the Billboard Hot 100 for a second week with "Harlem Shake," the Brooklyn producer's viral smash that continues to register enormous YouTube streaming figures. "Shake" debuted on the Hot 100 last week, concurrent with the addition of U.S. YouTube video streaming data to the chart. YouTube streaming data is now factored into the Hot 100 (and other genre charts), enhancing a mix of data that includes digital download track sales (and physical singles sales), as tracked by Nielsen SoundScan, as well as terrestrial radio airplay, on-demand audio streaming, and online radio streaming, as tracked by Nielsen BDS.