My SIL tried on either the same dress or something remarkably similar when shopping for her own wedding dress. It looked gorgeous on SIL, although wasn't what she wanted.
It doesn't look like it fits right in these photos, which is a terrible shame as it is a stunning dress, and she's very attractive. It may be the way she's standing though - I think she's slouching a bit in order not to tower over Kelly in her heels.