The upcoming birthday of Duchess Kate Middleton is just around the corner and the best way to treat a royal princess on her birthday is to give her a beyond expectations surprise. How about "Hello" singer Adele for her 34th birthday?

According to Celebrity Dirty Laundry, Prince William is planning a grand surprise for Princess Kate on her 34th birthday which is on Jan. 9 and it is scooped that the Prince tried getting in touch with Adele for the Duchess' birthday.

"We know the second-in-line to the throne has influence - and in a pinch could call upon Queen Elizabeth to apply some pressure - but an exclusive, surprise performance by the superhot megastar for Duchess Kate's birthday? That's seems too good to be true," as scooped by CDL.

Although this is a grand surprise for the Duchess of Cambridge, but apparently the 27-year-old singer is at the moment packed already with commitments and could not accommodate even a royal request.

"Allegedly the "Hello" singer's tour schedule was rearranged to accommodate Prince William's request. It doesn't seem at all probable that the insanely in-demand songstress would have any room in her packed tour schedule - not even to accommodate the future King and Queen," the publication shared.

Last year, the Duchess Kate Middleton very pregnant celebrated her 33rd birthday in the Sandringham estate together with Prince William and baby Prince George in a very "private" gathering. USWeekly reported that Princess Kate chose to celebrate a simple birthday last year because she doesn't want to leave Prince George behind.

How about this year? How will Princess Kate celebrate her 34th birthday? Will Adele surprise the Duchess and perform on her special day?