This video shows Best Actress winner Emma Stone backstage after the 89th annual Academy Awards, talking to the press. In her comments, she mentions how much they all would have loved for La La Land to win the Oscar for Best Picture, but how excited they are for Moonlight (which Stone says she thinks is one of the best films of all time).
She also made a point of saying, "I also was holding my Best Actress in a Leading Role card that entire time. So whatever story—I don't mean to start stuff—but whatever story that was, I had that card. So I'm not sure what happened."