The man in charge of the Oscars awards envelopes has been blamed for the gaffe that saw La La Land named best picture.PriceWaterhouseCoopers accountant Brian Cullinan was supposed to hand the best picture envelope to presenters Warren Beatty and Faye Dunaway on Sunday.In a statement, PwC said he "mistakenly handed [them] the back-up envelope for actress in a leading role instead."It's also emerged that Cullinan tweeted a picture of Emma Stone backstage just minutes before the mix-up took place.The tweet has since been deleted, though it survives on various websites and on a cached Google page.