And the 20-carat ring is definitely worthy of a princess, or in this case, an heiress. Diamond expert and celebrity jeweler Michael Greene gave PEOPLE all the details on the gigantic, pear-shaped ...

styled by Jamie Mizrahi (who has been working closely with the icon on her 30 album press tour), with glittering Lorraine Schwartz drop diamond earrings and a huge pear shaped diamond ring worn on ...