Yeah, I actually think they just pasted Garner's face from another photo to *that* shot of her.
*Does that make sense? It's still her body, but it's a different photo. Maybe she wasn't facing the camera in the original shot, and since it's supposed to be a poster, they decided to "make" her face the camera. Looking at that poster, her body has a strong yellow tint while the color of her face is kind of desaturated. Even her hair and left ear look weird. Horrible photoshop job, I tell ya.