I'm 16 yrs old, How Old Do You Have To Be To Get A Brazilian Butt Lift?

In my practice I would recommend to be at least 18 before performing butt augmentation. consider though implants, because there is a lot of disappontment with fat injection. Most of it does not last.

Hello dear!
Thanks for the question and provided information as well.
You should be at least 18 years old to be a candidate for plastic surgery. 
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less.
l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)