I want extensions but i don't wanna look like a scenester?

I wouldnt put 20' extensions in hair that is only shoulder length. Also, I wouldnt get clip ins. If you wanted extentions that looked natural I would go with fusion bonds. The attach to your hair at the root and blend in. They are a little pricier than clip ins but they last for 5 or 6 months. A professional will cut them into your hair so that you wont have that mullet like look.