First of all please understand that you can’t target one area on your body. You don’t lose weight like that. People lose weight first in different areas. But … here’s what you can do …
Cardio- helps you shed those calories
Squats- best exercise for your butt
Lunges- also helps lift the butt
Pilates- slims you down in no time
Try all these along with a healthy eating plan and your good to go. You can focus more on your butt when you exercise, but you can’t just target the butt and expect it to go away. There are also some floor exercises that are awesome too. Just google them