Carla Gugino. I first noticed her in that horrible Pacino/De Niro vehicle called "Righteous Kill" as the hot lady detective who had a hankering for
rough sex.
Then, when I looked her up on IMDB, I saw she was in "Sin City", which I immediately pulled it off the shelf to revisit. Whew! Got a really good look at her then, parading around in a simply stunning costume:
teeny little black panties....