This dress is totally Sarah Jessica Parker. You can tell it's her without even looking at her face. The bodice and belt are beautiful, and the tulle skirt is so fun.
I have to admit, I don' t know who Taraji Henson is, but I do know that her whole Oscar look really worked. Everything from the hairstyle to the necklace to the dress to the red clutch.
Penelope Cruz almost always appears at awards shows in dresses that look great on her. This one is no exception.