Britney Spears - Circus

In February 2009, Spears achieved further success in solidifying her comeback by having the second single of off her comeback album, "Circus" rise to number one on the Top 40 Radio Chart, making it the first time Spears has achieved back-to-back number one hits on the Top 40 Chart along with her comeback single, "Womanizer".


This makes her fifth number one song on the chart, putting her in a tie for second place for most number one Top 40 songs in the Mainstream Top 40's sixteen year history. Mariah Carey is in first place with six number one songs.