Britney Spears is planning to go on a world tour "definitely next year".

The 'Womanizer' singer - whose new album 'Circus' is released on December 2 - wants to perform her new material live for her fans.

She said: "I am rehearsing for a tour around the world which will happen definitely next year. I cut 'Circus' like two weeks ago. I've been working on this album for like six months now!"

?Britney also revealed winning three awards for the promo for her single 'Piece of Me' at the MTV Video Music Awards (VMAs) earlier this year has inspired her to experiment in the genre further.

In the interview with New York radio station Z-100, Britney said: "'Piece of Me' is a cool video but I think by far I've done videos that are way better. But it was really inspiring to win because now I can go there and do something crazy."

The mother-of-two also gave some insight into the meaning of her new single 'Womanizer', adding: "It's a really cool song. It's basically saying, 'We know what you're up to.' It's about guys cheating on girls. It's a girl anthem. That's why I like it."