Lower Ab exercises ?

What are some really good, effective ab exercises for your LOWER abs ?? My upper abs are like…buldging lol but I can’t get anywhere with my lower abs, I’m eating extremely healthy and drinking a hell of a lot of water so that’s not the problem, but they’re just not getting any better, i barely have any lower abs. Help ??

Also, second question about lower abs. You know the two bones on the sides of your stomach and how people get abs like over them and they stick out, like Chrystina Sayers…here’s a picture …

http://www.imdb.com/media/rm1695716864/nm2986861

do you know what i mean ? Well, how do you get them ? If it’s from dancing ( because she’s an amazing dancer ) then i can forget it! Hahah