Booty Workouts?

I used to have a KILLER butt in high school and I ran track as well so I was very active. 3 and a half years later and I probably only work out 2x a month. I'd really love to get a larger butt and also get rid of cellulite, do you ladies have a routine that has actually worked for you? The pictures are what I'm working with already (my BF says he loves it but I feel ashamed because of what it used to look like and the cellulite I have which you can't really see in the pics. Also, my bf's butt is loke 3x the size of mine and is suuuuuuuper nice). I'd also love to see some before and after pics!