Let me see here... There are quite a few of them. I'll list some of the worst.
Ballad of Clay Carmine by Miracle of Sound
Can't Touch This by MC Hammer
Fuck You by Cee Lo Green (unless taken literally, in which case it works fairly well)
DotA by Basshunter
Gaston from Beauty and the Beast
I'll Make a Man Out of You from Mulan
I Just Had Sex by The Lonely Island (Came on before I had sex at one point... The irony was it put sex off by another hour or so.)
Any of the Epic Rap Battles I've got (by Nice Peter)
And that's just a few of them. The sad thing is that I've actually had this happen. Multiple times. Some of them make some pretty awesome stories too. At one point we were in the process of shedding clothes. The music had sounded like it had stopped, but neither of us noticed. So she goes down to take my pants off when, all of a sudden, the music hits the loud part and we both realize what's playing; The Kraken from Pirates of the Caribbean. Me, being the awesome guy I am, immediately said "Release the Kraken!" and we both died of laughter for a bit. Completely ruined the mood, but it was totally worth it.
Another? In the middle of doing the deed Sexy And I Know It by LMFAO came on. Perfect timing; I was able to keep going while doing some of your typical body-builder poses. And the wiggle-wiggle-wiggle part... Well, things got dirty. Needless to say, having sex while laughing is challenging but awesome at the same time. Try it.
Last one for now. This one's gonna get a bit graphic, so young eyes should shield themselves. Beat It by Michael Jackson found its way into my playlist and decided to pop up near the end of a rather intense session. So, instead of just letting things happen like usual, I pulled out and "beat it" on her chest. Let's say she was not happy with me. The sad part is that she didn't get the reference until I explained it to her, after I was done laughing, then running from her as she tried to hit me. Even then she didn't find it funny.
Captcha: Tickle the Ivories.
That's not all that was tickled, my friend.
Edit:
Tallim said:
Cranky said:
You Are A Pirate-because I do have it.
Although, the booty in the song could mean different...
Original or the cover by Alestorm?
because I think I could work with that.
I need to stick that in the playlist somewhere... My god, it would be perfect. Because, ye know, I be gettin' some booty, an' she be rais'n me Jolly Roger. Heh heh heh.