Hi Emma,
A lot of websites suggest that the ideal way in which to dress like Boy George is to wear a long white tunic and trousers with a black waistcoat. large hat with black plaits. Face heavily made up. There are many different sites on the web which will help you with the make up, but a good one I found is here:
http://www.youtube.com/watch?v=21yZcq2MfKY
I would suggest in terms of hair, braids with a headband or backcombed hair with a headband would probably work best.
Hope this helps :)
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