You're a bride, not a queen. You can't exactly issue a decree proclaiming that no female attending the ceremony wear white just because you don't want any unfavorable comparisons. Yes, it was once -- and still is, according to some etiquette experts -- a faux pas for female guests to wear white to a wedding. But there's not much you can do about your brother's new socially dim-witted girlfriend. What are you going to do, kick her out? On second thought, let's not even go there.