As the saying goes, sometimes it takes an army. (It really doesn't, a good wedding planner can get you into your gown lidkey split)
But this makes for a great picture of all the bridesmaids together for a more unposed picture. This way you get all the girls getting the bride ready.
HINT: Have all of your Bridesmaids be in their dresses when you get dressed, this way they aren't in PJ pants and a button down T-Shirt for pictures of you getting dressed.