I remember finding an interview where the director, John Luessenhop, spoke about how great her stomach was.

http://www.craveonline.com/site/202713-the-spoiler-interview-john-luessenhop-on-texas-chainsaw-3d

On the other hand it is a horror movie, and there’s always that sense of the risqué, of tawdriness that the audience is going there for. But you seemed to have focused on, again, Alexandra’s stomach.

I loved it. When they showed me the wardrobe possibility with that, it was like, “Absolutely.” She’s like this [extends arms upwards, like he’s tied up], hanging, and she’s on her knees, and her shirt is open, and her stomach is there. It’s unbelievable. It’s the poster… It could be a poster for the movie. It should be in the dorm room of every dude in America. Yeah, it was like “Oh my gosh.” I can’t tell you how many times in the editing room we stopped on that frame and just went, “Oh god…” And it wasn’t like it wasn’t everything else, I mean she’s built every which way, but it’s the stomach. We just went, “Look at her…”