This looks cool but I don't understand the results.

The correct path is the one highlighted in blue.

Is the most popular path the one that always follows the largest child? Or is the top-most child the most popular one? This is unambiguous on the Britney Spears example, but not on Zooey Deschanel, for example.

Also, I'd never heard of half of these people so had no idea how their name should be spelt.