There's a charity prom at dd's school for Y7 and 8 on Fri 18th. Have no idea where to find "formal" dress for dd who is tallish (for 12), blonde (therefore no black as it looks v cheap) and slim - may get away with an adult 6 or 8 but don't want her to look too grown up. Had a quick look on line but need some pointers please. Don't like Debenhams dresses. Any ideasfor something a bit alternative and funky please? I offered to get the sewing machine out but she declined....