A quick quiz

For a Freakonomics t-shirt and a signed copy of the book:

What is the most notable thing that my wife Jeannette and LeBron James have in common?

The first person to guess what I have in mind wins. None of the wimpy stuff Dubner does, giving away a second prize to people who answer the question correctly, but later, giving the excuse they live in the wrong time zone.

This is not an easy question, but my guess is that someone will get it. If no one has gotten it by this afternoon I will toss out a clue.

Clue #1: I only learned today that LeBron and Jeannette share this thing.