At the moment, having doughnuts in you hair, not literally doughnuts,is very fashionable. You could just have a simple one, one with a plait around it, a bow on the front of it or a plait leading up to it. Comment on which is your favourite.
Instructions on how to make a simple one...
1. Make a pony tail
2. Put the doughnut onto it
3. Randomly place hair all over the doughnut and put an elastic band over it
4. Wrap the hair around it
5. There you have a doughnut!