Above, a September 1966 Confidential with a rivalry theme featuring Ursula Andress vs. Claudine Auger, and Jackie Kennedy vs. Princess Grace. Andress and Auger are compared merely for their Bond girl qualities, but Kennedy and the Princess actually did have their resentful moments. These were detailed not just in the tabloid press—even supposedly sober magazines like Time reported on the feud. Perhaps it was inevitable. The two began as friendly acquaintances and ascended to positions of American royalty, a level that was surpassed by Grace Kelly when she became an actual royal with her marriage to Prince Rainier III of Monaco. A widowed Kennedy later married Greek tycoon Aristotle Onassis, who happened to be an epic business and political rival of Rainier. How epic? Rainier actually suspended Monaco's constitution to put an end to Onassis’ meddling in its internal affairs. So taking that into consideration, it’s amazing Jackie and the Princess never tried to choke each other out. But like everyone says, that was a much more polite age.