What's the Worst band ever?

Okay, so there’s a thread that’s asking for who’s the greatest. I think the inverse is also necessary, so what’s the worst thing you’ve ever heard? Who do you think is devoid of talent? What sounds like cats using a chalkboard for a scratching post, in your opinion? Here’s my worst 5 of all time:

  1. Chumbawumba
  2. King Diamond
  3. Nickelback/Fuel/Creed (sound so much alike they share a slot), or any of their clones
    2)Coheed and Cambria

and the all time worst,

  1. Poison.

All of these bands cause a perfect sphere of bile to rise in my throat. Anyone else have some music that they absolutely cannot stand?