Well in honesty you look fine the way you are, as long as you keep exercising and staying fit you should be fine, you'll be healthy and have energy and look good in the process but basically what I'm trying to say is don't be so insecure about your body and trying to look like what guys or girls would think is "the perfect girl". Just be happy with the way you're know, it's great to set goals for yourself but in the mean time just remember to be happy with what you have and how you look know. I know this isn't really answering the question I'm just trying to make a point.
No. You can get a "bowling ball" butt which is where the shape is similar but it's rock hard muscle, but without muscle shaping it you're left with whatever shape nature gave you. Nature decides where fat accumulates and on some girls, like the girl in the picture, it just happens to accumulate on her butt in that way.
Pretty sure you've got what you've got. You can alter the size and firmness through exercise, but shape not so much. Plus, this like lunges/squats/running will only tone it. To have a decent ass one must have some degree of fat tissue in that area.
Well if you do exercises that work your glutes hard, then yes your butt is inevitably going to be bigger. Will it make a HUGE difference? My guess would be probably not. But I really don't know. Doesn't hurt to try.
You can tone it, squat it out, and lunge to the death. Unless you surgically put some fat in that booty, it will not look like that back. You'd have to start with a relatively round bubbilicious ass in the first place, and work on toning it to that look. Trust me...I'm a donkey expert.
Sprinting, squats & lunges can help shape and define the butt, but one cannot go from a pancake ass to that if that's what you're meaning...
The bubble butt thing is genetics, just like how some women have clevege and others don't regardless of cup size. I myself have a propper bubble butt, I get it from my Dad lol. My sister has a flat butt that she gets from my my Mom.
As for your butt, exersize will give you some lift but not much in the way of size.
Darn, a warning about the pic would have been nice haha
Squats will help! It's going to tone your thigh muscles too though.