Drag Queen Event for Charity?

-Im takin part in an event for a local charity where I will be in a contest with other men to see who can do the best drag queen!! I have all sorted for the appearance, ie the dress,shoes and makeup, but Im looking for advice on how to come across!! Im not very confident and wouldnt usually do something like this as Im nervous in crowds but gonna do it anyways....Any advice on how to overcome that fear and how to act on the night!!