Google edgy hair cuts to get ideas. There are a lot of hair ideas on pinterest. The edgiest hair I can think of is like Pink/Miley Cyrus. Ashley Tisdale has kind of edgy hair, same with Demi Lovato. You could choppy layers or straight long "razor sharp" looking layers. Seventeen, Teen Vouge, and Glamour, etc. are magazines I look at for hair ideas a lot of the time. Whatever you decide to do just do it for yourself and own it! :)