People Forget The Obvious..

..which is that you can't expect that a bunch of crunches and tons of ab workouts and get abs like these:

 

First of all, Ava Cowan probably has less than 10% body fat, you must have a low body fat percentage for your abs to show, we all know they are there. You can work them as hard as you want, but unless you get rid of that fat first, there not going to show..I don't know how many people ask what exercises will get my abs showing, well get your body fat down first..you can still do the exercises and such because then when your fat is low they will show better and be better defined. 

Running, Squats, Core work, Lower back exercises. These will get you six pack abs along with a good diet and low body fat.