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

There is no age limit for a Brazilian Butt Lift. As long as you are in good physical health and have enough fat to transfer you can get the procedure.

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 :)

Thank you for your question. There is not a specific age, but first, for safety reasons, to be a good candidate for the procedures you want at the same time, your labs and  cardiovascular preoperative evaluation must be optimal.
Kind Regards,Dr. Emmanuel Mallol Cotes.-