Being the bearer of bad news falls in the category of 'things I'd rather not do' -- along with cleaning bathrooms, fighting off a bear, or installing new software. In all these cases, it's best to be smart about it. And quick. Especially in the case of the bathroom. And the bear.
I am not going to suggest you picture your audience sitting in their underwear. You are already nervous, and far be it from me to make you physically ill while picturing a bunch of folks lounging in their skivvies. Like life isn't scary enough.