A white dress
It might seem pretty obvious but still, I'm surprised by how often I see women making this mistake. Not cool, ladies. Save the floaty white dress for another occasion and take your pick of the 8,000 million other colors chilling in your closet—SERIOUSLY.
Anything too short 'n too tight
If you're really drawn to these kind of get-ups, you might get away with one at the bachelorette party. After that, skip it. Enuf said.
A really conservative suit
Suits at weddings can be a Do if they've got a skirt, come in a pretty color and have feminine details (think, gorgeous vintage Chanel skirt suit). But that blah work-y thing you wore to the last three job interviews? Nah. Remember, weddings are supposed to be celebratory occasions.
An upstager dress
This part gets tricky, especially if the invitation reads "black tie." A good rule of thumb is to think carefully about what gown you pick. If it's something that's shouting "Look at me! look at me!" or has center-of-attention details like a train or bustle, you might want to reconsider.
Jeans
Sure, they're sexy, comfy and you can dance all night in them, but c'mon—it's just bad manners. As a bride, I was even a little offended by the few people who opted to wear golf polos and capri pants to my Saturday night reception. Plus, what will grandma think?