Will Just a Brazilian Butt Lift Make my Stomach Flat or Should I Get a Mini Tummy Tuck? (photo)

     I would recommend a Brazilian buttlift and tummy tuck.  Minitummy tuck would not take care of the loose skin and the stretchmarks as you would want.  A short scar tummy tuck could be performed to give a smaller scar and all of the benefits of tummy tuck.

Hello dear!
Thanks for the pictures and provided information as well.
Based on your photos, you are a great candidate for liposuction with a BBL and a tummy tuck with muscle repair, to give you a nice tight tummy and to get rid of the extra skin, and I think you'll get very good results. 
Liposuction allows your plastic surgeon to transform your entire shape. You can improve your waist, back and flanks, and of course your buttock, to give you a beautiful heart shape, along with the tummy tuck.
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 :)

Brazilian butt lift with liposuction to the stomach will certainly decrease your waist and improve your figure.  In your case specifically however, you have a fair amount of extra skin as well.  To get rid of that extra skin and give you the perfect abdominal contour as well, I would recommend a tummy tuck for you. Good luck.