Britney Spears Zone" and "Blackout". She has also experimented with genres such as dubstep, first on "Blackout"'s "Freakshow" and again on "Hold It Against Me" from "Femme Fatale". Spears' music also has been described as Spears is a soprano. Prior to her breakthrough success, she is described as having sung "much deeper than her highly recognizable trademark voice of today", with Eric Foster White, who worked with Spears for her debut album "...Baby One More Time", being cited as "[shaping] her voice over the course of a month" upon being signed to Jive Records "to where it is today—distinctively, unmistakably Britney". Rami
Britney Spears Candie's, which was released in stores in July 2010. In September 2010, she made a cameo appearance on a Spears-themed tribute episode of American TV show "Glee", titled "Britney/Brittany". The episode drew "Glee"'s highest ratings ever. In March 2011, Spears released her seventh studio album "Femme Fatale". The album peaked at number one in the United States, Canada, and Australia, and peaked inside the top ten on nearly every other chart. Its peak in the United States ties Britney with Mariah Carey and Janet Jackson for the third-most number ones among women. It has sold 1,000,000 copies in the United