Bailon was wearing a see-through black dress -- which Celebuzz reports is a "sneak peek of [Bailon's] upcoming fashion line collaboration with Dominique Auxilly" -- that zipped up the back and was supposed to be shielded in the front by an enormous cream-colored ruffle, which is probably why she decided to go commando.
You can see where this is going.
But when a breeze struck -- or Adrienne simply moved to the side-- the precarious ruffle blew aside and revealed WAY more of Adrienne than is publishable.
Eek! Well, at least her lacy Louboutin booties matched. Poor girl.