I really like the approach you took drawing her abs. Though one bit of feedback, her shirt's got this weird cut-off point otherwise I think this is pretty good especially with the belt, no idea how you nailed it. edit: to clarify, part of her shirt has this flat bit of coloring that looked off when I initially saw it. At the bottom part of her shirt there's this line that makes her chest look off when it isn't. Apologies for leaving you confused.