Britney Has Most Top 40 Hits This Decade

With her song "Radar," the fourth single from Circus, debuting at No. 35 on the charts, Britney Spears garners her 21st entry on the Mainstream Top 40 in this decade, becoming the artist with the most hits on that chart this decade.

Previously Brit was tied with Nelly at 20 charted titles apiece.