If your hen is one of those who will want to stand out, but not by wearing a sash or boppers, then why not go for something which is far more classy and have her kitted out in a tie. This comes in pink and has 'bride to be' on in pink and black writing with several small love hearts surrounding it.
We also have versions of this tie which say 'naughty but nice', 'young, free and single',