I Was Only Joking, But It Turns Out It’s TRUE!
It was simply a throw-away line. "We could be Kansas City Royals". I didn't know that an old picture of Kansas City Royals Hall of Famer George Brett really did lead to Lorde's song "Royals".
The two finally met up and ESPN's website has the story here.
What's most amazing to me is that she saw his picture in an old copy of National Geographic, not some sports magazine. But, then, it was in New Zealand.