Britney Spears will be dirty 30 this December, but she says she couldn't be happier about it.  According tothe new issue of Glamour magazine's UK edition, Britney says that she's "definitely going to celebrate and do something spectacular", noting, "I'm going to be in South America so I'll have to do something pretty fun."

Britney plans to perform several shows in London in October.  When asked about the possibility of Prince William and Kate Middleton attending one of her concerts, she tells Glamour, "That would be amazing.  That would be really crazy and cool.  I think they’re a beautiful couple.  Unfortunately I didn’t get to watch the wedding but I heard it was beautiful."  Britney also tells the magazine that she had "no idea" that William apparently once cited Britney as his teenage fantasy girl, a fact which she finds "hilarious."

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