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Britney Spears has announced that her seventh studio album will be called Femme Fatale.

The record's out on 29 March and the first single Hold It Against Me is at number eight in the chart.

The singer, 29, has sold nearly 70 million albums around the world and five of her previous six records have gone to number one in America.

Britney Spears has also just made a cameo appearance in US TV series Glee in an episode called Britney/Britanny.

Speaking about her latest album on Twitter, the singer said: "I've poured my heart and soul into this album over the last two years.

"I've put everything I have into it. This album is for you, my fans, who have always supported me and have stuck by me every step of the way!

"I love you all! Sexy and Strong. Dangerous yet mysterious. Cool yet confident!"