9
Something Skimpy
Nothing screams "look at me" like a skimpy outfit.
There's nothing wrong with showing off a little leg or décolleté every once in a while, but there's a time and place for such things, and weddings aren't one of them.
No, you're not exactly showing up the bride, but showing off your assets is a surefire way to take away from her big day, so don't do it.