Jessica Alba may be reprising her role as stripper Nancy Callahan in the highly anticipated sequel Sin City: A Dame to Kill For , but don't expect to see too much skin from the star. That's because the year-old always makes sure to incorporate a nudity clause when filming flicks. That's it," Alba says in the June issue of Glamour. And, I mean, really, if you look at the movies I have done, getting naked would never 'elevate' the picture. After all, Alba shared a similar sentiment when the first Sin City was released back in I just don't," she told Elle magazine at the time.