No, it won't come back to me, or if it does, I don't care. The song needs to be readily available on services like Spotify or Deezer. Subtlety won't really work, so stuff like Rage Against the Machine is out.
Yes, this is childish. Yes, I want to make people stop talking and look at each other uncomfortably. No, the songs won't be checked ahead of time, some genius in the Culture Club has created a slackbot for this.
Best case scenario is that people spit their drinks and clutch their pearls.
EDIT: The suggestions so far are okay, but I need things more outright offensive. Not something you need to listen to, but something that you're forced to hear.