Eat clean (more veggies, less processed food) and do cardio.
Strength training, like squats, does make your muscles a little bigger. Squats are great for shaping your butt.
lots of cardio, to lose fat. get your sweat on!
and then once or twice a week do a leg workout and then a butt workout. theres tons on here and also tons on youtube, pinterest, tumblr etc.
THANKS!! ALL OF YOU.