Here's a fun bit of girl math. In 2015, I bought a new medium, studded Chanel Boy bag. In the years I owned it, I wore it at least six times a month — and that's a conservative estimate.

But did you spot her Chanel bag? The 42-year-old carried a vintage ... meaning it can be worn on the shoulder or cross-body. On Saturday, Kate chose to carry it as a clutch and tuck the strap ...