This year’s Oscar ceremony is going to be remembered for a major “oops!” at the end of the show. The producers of “La La Land” were nearly done with their acceptance speeches for Best Picture when producer Jordan Horowitz returned to the microphone and said there had been a mistake, insisting “this is not a joke,” and that “Moonlight” was the real Best Picture winner. It appears the presenters were given the wrong envelope. For the “Moonlight” winners and the “La La Land” winners-turned-losers, the correction was done gracefully and all was forgiven by the players. But the accounting firm responsible for the integrity of Oscar voting is vowing a full investigation.