The biggest Oscar presenting disasters

It’s squeaky bum time for comedian turned talk show star Ellen DeGeneres as she prepares to host the 2014 Academy Awards - her second ever stint at presenting the show. Will this be the year she cements herself as a replacement for Ol' Safe Hands himself, Billy Crystal, or will it be car-crash awkwardness with musical numbers about mammary glands (We’re looking at you Seth MacFarlane).

We'll have to wait to find out... You see, not everyone can be trusted behind that podium come Oscars night. Here's a useful guide for future hosts on how to present the Oscars, using some real-life examples: