Play that Chris Brown song about how he's not sorry he beat the shit out of Rihanna.
Seriously though, isn't the first dance supposed to be, like, just the bride and groom? Play something that has special significance to you.
If there isn't such a song, then "Sex Bomb" will do.
One of my cousins had an all-Danzig wedding and gave out a Danzig mix CD to all the guests. I'm proud to say I'm not kidding at all. I've still got that CD somewhere.