You wouldn't necessarily think Amazon would be a top shopping destination for women of the Royal Family , but a surprising number of their reported favourite beauty products can be bought from the online retailer. What's more, many of those buys are now in big sales thanks to Amazon's Spring Deal Days event this week. From a bee venom face mask that's been causing a buzz in the royal household for many years, to a hair range that has apparently gained Kate Middleton 's nod of approval, Amazon