QUOTE(lucky045 @ Jul 3 2008, 10:24 PM)

One I love is white with a black sash, and black butterflies, and is strapless, I love it, but I'd guess it's a bit too posh, do you think?
I'm very lost, I know I'll wear some black heels that I like, but otherwise, no idea! My singing teacher says to dress for a performance, but what kind of performance?
Your "butterfly" dress sounds lovely, but if it's going to be rainy and a bit cold, you might end up shivering in it. Also, you don't want to feel self-conscious in whatever you wear, and if you're thinking it's a bit too posh, it sounds as if it might make you feel self-conscious.
For my exam a couple of weeks ago, I was torn between wearing a "posh frock" and smart-but-not-too-posh - in the end I chose the latter (knee-length black skirt and coloured top) and I was glad I hadn't gone "posh".
So I would recommend wearing something that you feel physically comfortable in; not self-conscious in; and maybe something with layers so that you can take off or put on, depending on the temperature.
PS. Glad you got to your lesson in the end by the sound of it - if I lived in East Yorkshire instead of West Yorkshire, I'd have given you a lift myself