Wondering if this dress is posh enough for a summer wedding party next weekend. Its meant to be mainly outdoors. It is lovely on - gives me a waist / hips that I dont usually have so I quite fancy wearing it but wondering what accessories I could get to make it a bit smarter. Thought about a pale lemon cardigan type thing but worried a cardi would make it more casual. Also not sure about shoes. Thanks for any help anyone can give.