I'm a skinny girl with no body fat. How can I achieve a big butt like Beyoncé or Nicki Minaj?

Hello,There are many skinny patients able to have a Brazilian Butt Lift, but it would definitely be base on evaluation, search for a Board Certified Plastic surgeon the perform this procedure in a daily basic.There is also very important for the patient to be realistic.Thank youDr.Llorente

Hello dear!!
Thanks for the question and provided information as well.
Looks like you could benefit from a butt augmentation with implants, but unfortunately, without pictures, it is very difficult to give you a proper answer. 
The average cost varies a lot depending on the clinic, the country and the plastic surgeon. 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 :)