Princess Diana was well-known in royal circles for her cheeky sense of humour – and the cake she reportedly bought Prince William on his 13th birthday sent the future King of England "bright-red", according to a former royal chef.
The Duke of Cambridge, who turns 39 on Monday, June 21, was reportedly rather embarrassed by his mum on the day he became a teenager.Prince Harry later revealed Diana was a "total kid through and through" – and she proved it 16 years ago.
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