From an 80's karaoke bash to an exquisite tiara present, it seems that the Duchess of Cambridge will have a treat on her upcoming birthday. Here are leaked details on how Kate will spend her big 3-0.

With the Duchess' birthday on Jan. 10th, plans have been laid out for the much-awaited celebration. It's no news that her sister Pippa is a professional party planner, which is why it will be no surprise if the event will turn out to be one of Kate's best celebrations yet.

On the night before her birthday, it is revealed that The Duchess will see a screening of Steven Spielberg's film, "War Horse," with her husband, Prince William by her side. After the Royal Couple's movie date, there is said to be a charity dinner, with tickets costing £10,000 each.

Catherine has mentioned to her closest friends that she'll be more grateful if they donated to charity instead of giving her presents for her special day.

A royal source has also tipped magazine, Grazia, that Pippa and Prince Harry have set up and 80's themed party for Kate to pay tribute to The Duchess' favorite decade. Attended by close friends and family, the party will include a karaoke session, top of the line champagne and food.

"Kate needs to enjoy herself while she can, though, so she can be forgiven for belting out a few Duran Duran and Madonna numbers on her birthday" says a source in a report.

It was also said that the Queen will be handing the Duchess a valuable tiara as a present, a fitting gift for the elegant and fashionable wife of her grandson. Another source claims that Prince William has commissioned an exquisite oil painting of the Duchess 'in all her glory.

View the slideshow to see the Duchess' most memorable looks for the past year

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