teenagers , shall i say more???

My teenage daughter is a handful! What is wrong with kids these days? I would never talk to my mom the way that teenagers talk to their parents these days! I have tried every punishment that I can think of. I have taken things away and added things to her. I have paid more attention to her and tried to talk to her! When did my sweet little girl become so selfish and disrespectful? I am at a loss and my hair is about gone!!