Sam Shepard and Jessica Lange in one of their last red-carpet appearances together. (Paul Hawthorne/Getty Images)

We think we know them, but face it: We really know nothing about stars except for what they want to tell us. That’s why showbiz writers throw so much energy into analyzing their red carpet appearances for signs of what’s going on in their lives. (Johnny Depp and Vanessa Paradis haven’t red-carpeted together in more than a year — a sign of trouble?) As absurd as it seems, intel from the red carpets is what’s helped celebrity journalists — much like Cold War analysts — uncover the shifting dynamics of secretive power players. A look at the bizarre but terribly important science of Red Carpet Kremlinology.