I'm not going to let my 16 year old daughter wear a padded sports bra and get one side of her hair cut very short.
Why won't you allow your daughter to look the way she wants to?
It would be fucking ridiculous to let her do those things. She's just a kid.
As a parent it is good for you to teach your kids acceptable ways of dressing and presenting themselves to the world. Setting boundaries are okay, but at a certain point you have to allow your kids to be themselves and not try to control them because you don't like their decisions.
I will tell my kids whatever I feel like telling them.
Your attitude towards your daughter is very authoritarian and controlling. She is 16 years old and she is not dressing inappropriately, so your telling her how to look is interference. Open up to the idea that your baby girl has grown and needs some independence now.