My Beloved Hair Style - Ombre Highlights

So I'm thinking of changing my hair, it's just plain at the minute and has a slight curl, so I'm thinking of getting ombre highlights. I don't want it to look fake I just want a sligh sun kissed look that adds a little more colour. Rose Byrne and Rachel Bilson have got the look just right, but i don't know if I am brave enough to actually take the leap. I have never had anything major done to it, so this would be a big change.....I'll think about it.