Chart News: Rihanna breaks tie with Katy

Rihanna rewrites the record for the most No. 1s on Billboard’s Nielsen BDS-based Pop Songs radio airplay chart, as Eminem’s "The Monster," on which she’s featured, jumps 4-1. The song is Rihanna’s 11th No. 1, pushing her past Katy Perry (10) for the most leaders in the chart’s 21-year history. P!nk, Billboard’s current cover act and Woman of the Year, follows with nine No. 1s.

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