If you want something crazy then do this:go for a short,spiky,punk style.Then dye it all black with streaks of blue,green and orange with bright purple tips!Then bedazzle it with glitter!You will have so much fun with this you can top it all off with lots of braclets with tons of studs and spikes!Then where a rockin vest with tons of bright neons and a pair of skinnies!Wear a pair of wedges or even better chuck taylors that go up to your knees!Have fun!
You could use a temporary neon hair dye and make patterns. You can also try out planting jewels on your hair using a bejeweling tool. Have your friend help you so you can get the jewels in the right place. Be sure to avoid hair styling products when bejeweling your hair to prevent the jewels from getting loose.