Britney Spears flies in at No. 1 on the Billboard 200 chart with her sixth chart-topping album, "Femme Fatale," selling 276,000 copies in its first week, according to Nielsen SoundScan. The feat ties her for the third-most No. 1s among women with Mariah Carey and Janet Jackson. Only Barbra Streisand (nine No. 1s) and Madonna (seven) have earned more No. 1s.