While we're forever inspired by European royals style stateside, one major European princess seems to quite inspired by one of our very own (albeit unofficial) royal: Jackie Kennedy. Time and again, the elegant Princess Tessy of Luxembourg channels the former First Lady's iconic style with classic pillbox hats, car coats, and shift dresses for official engagements alongside husband Prince Louis. Let's examine the evidence! Exhibit A: The Pillbox Hat The Jackie Way: The Princess Tessy Way…