Girl, it's all about diet, cardio and weight training! Everyone has stomach muscles. Exercises will help to strengthen and sculpt those muscles, no doubt, but it's mostly diet and cardio if you're looking for those abs to come out.
As for getting that "bodybuilder look", which I assume you're relating to as "mass", you're mistaken if you think that by weight training you'll become Hercules overnight. It won't happen then or after a month or ever! Women are not genetically (naturally)made to become 'huge' - that's probably the number one misconception about bodybuilding and women.