Ever since Kate Middleton became the Duchess of Cambridge, people have been comparing her to Princess Diana, the favorite People's Princess. Of course, no one can compare to Diana, but Kate is a popular royal in her own right, each day earning more respect and fans. While Kate and Diana have some stark differences -- they also have some major similarities. So much so that it appears obvious that Kate is quietly behind the scenes studying Diana's ways. Or maybe not so quietly, as rumor has it that not only did the royal family show Kate video tapes of Diana that she could learn from, but Diana herself left behind audio tapes for William's future bride. Here are 9 things Kate clearly learned from Princess Diana.