Hello 2020FisherDollT, I appreciate your questions! Every patient is unique and there’s no an ideal weight for a successful Brazilian Butt Lift (BBL) surgery. With VASER Liposuction and fat transfer to the buttocks (BBL) you can get rid of excess fat from specific areas such as arms, back, abs and flanks and transferred it to your hips and buttocks for a beautifully contoured figure. I would suggest consulting with an experienced plastic surgeon to assess your candidacy for BBL based on your general health status, age, body shape, skin laxity and Body Mass Index (BMI), among other factors. Moreover, I would recommend asking your plastic surgeon if he/she requires you to gain weight or not depending on whether he/she is planning to do a full body Liposuction or just a limited Liposuction to harvest the fat. Best wishes! Dr. De La Cruz.