I don't want to go out and buy clothes for this party that I'll never wear again; but conversely, I don't want to 'upstage' the birthday girl or upset her on her birthday. What do you think I should do? Suck it up and buy an outfit similar to what everyone else will wear, or wear what I want and hope it all works out?
Have you ever committed a major fashion faux pas, or seen one committed? My answer is in the comments.