Party costumes/characters out of a white dress?

my 16th party, not sure what theme yet. But i have a gorgeous white dress that i really want to wear, so im going to decide on the entire theme around this dress. its short, and lace and has frills around the top. I could be an angel, but thats too cliche. what other characters are there? and what themes can i have? im already thinking heaven and hell, fairytale (but cant think up of a costume for this theme) or neon party. its pretty soon so im kinda desperate. ty xx