I am really wanting a BBL sometime next year. I am 5"7 currently weighing 150lb.. What is the ideal weight?

Hello dear!
Thanks for the question and provided information as well.
Your BMI is within the recommended range, but unfortunately, without pictures, it is very difficult to give you a proper answer.
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 :)

Typically there is not an ideal body weight for a BBL, however there does need to be a sufficient amount of fat where your body will retain the weight. I would suggest a BMI between 28-29, this will put you in a range of being at a weight where your body is likely to maintain the weight post surgery but not put you at risk during surgery by adding to the risk of complications. Posting pictures would give a much better look into an ideal weight for you. Always best to see a board certified plastic surgeon in person for evaluation.Thank you for your question!Melinda Lacerna, MD FACS