Judging by the shadows in #1, the catchlights in #4, the washed out/overexposed look, I'd say very powerful raw flash from the direction of the camera and the subject is as close to the wall as she can get. It could be a wider snooth to give the vignette if it isn't done in post. And in order to minimize the dark areas under the chin and arms, I'm guessing the camera was positioned about mid-body/waistline area (which is a common way to photograph brides, oddly). Light coming from there would eliminate the usual tell tale shadows under the chin that characterize direct-flash.