Oh my golly gosh - I am totally laughing! Look at that cleavage of the girly on the right - it looks really weird and unnatural, and clashes with the understated style of the dress! Gosh, they are like two huge swollen mosquito bites, yo - they look like lumps that aren't supposed to be there! If it was just the dresses and not how they blend with and hang on the people wearing them, I would say the black version of the dress. At least for girlies with dark hair - that light grey really needs to go with a different hair colour, like red. A redhead would look great in it, yo! Neither look good, really, but the first girly doesn't make me laugh in the way that the second does. She could blend in more with other gawky people whose dresses are not quite right but aren't ridiculous either.
What is it with these all these girlies' postures though? Like, aren't celebs supposed to develop good posture? The only one who has a good posture so far (working back, yo!) is Alicia Keys. The others are kind of gawky.