I decided to stitch the back with crochet instead of a button. The top can fit over your head and seeing as it could be risky with a button, that being it could come undone I figured that a permanent join would be better than ribbon or a button.
The vintage broach, another from my collection.(Working at New look for 5 years meant a lot of broaches)
I think it works well to set of the pink stripe off. The top is actually wearable and not too much fantasy which is good for me;-)