I wish I was her.
First of all deciding how to do it took me a while. There are a couple options but obviously I wanted something non- permanent which ruled out real hair dye and some stuff involving bleach. The next option I found was food colouring. It sounds a little dodgy but after watching a few YouTube video's it looks as though it works.
Anyway I thought that seeing as though it is the holidays now it should be relatively safe to give it a try so that I have a couple weeks to get it out of my hair if it does turn out to be more than temporary. I decided that I wanted to have blue tips, like in the pictures below.
Seeing as though I'm a bit of a wuss I just did one small piece of hair as a test to see how long it would take to come out. I used this video to get the hang of how to do it: