Prince Harry ordered a $200 (£144) bespoke 'naked cake' for wife Meghan Markle to celebrate her 40th birthday, according to reports.The Duchess of Sussex, 40, who recently revealed her plans to ask 40 friends to donate 40 minutes of their time, reportedly enlisted the help of top celebrity event planner Colin Cowie to organise the celebration at the £10.5million California mansion she shares with Prince Harry.