What is the most unintentionally inappropriate song you've ever heard played at a wedding reception? I have been to multiple weddings where everyone present was chanting "we want prenup!" (too late, folks), but Get Low is a promising contender, if only for the location of the singer's dripping sweat. Not that these kinds of songs aren't great for dancing, but they can be a little funny if you listen too closely.
Mandatory disclaimer to my recently married friends: Your weddings were awesome.