There's a whole lot of buzz surrounding the British royals thanks to the arrival of Prince William and Kate Middleton's baby girl, but how much do you really know about the royal family? Did you know Prince William once stood up Britney Spears or that a famed musician wrote an official lullaby for Prince Harry? With a mix of royal etiquette issues, information about their royal titles, a nod to some memorable scandals, and more, here are 49 facts you may not know about the British royal family.