It's safe to say that Brad Pitt and Angelina Jolie will be the most photographed couple at Sunday's Academy Awards. The flashbulbs go off like strobe lights in a club as soon as they arrive anywhere, so you can only imagine their arrival at the biggest event of the year. Although they've attended the famed award show together just once--in 2009 when she wore that black Elie Saab gown with those to-die-for Lorraine Schwartz emerald earrings--they both have a long history with Oscar. Let's…