What was the worst form of torture used in history?

Sitting through an episode of "PeeWee Herman goes to Washington".

I watch a show called Vikings on the History Channel. One gruesome torture they depicted was done like this: A man was on his knees and his back was sliced open, down to the bone. His ribs were cut from his backbone, one by one. His lungs were pulled from his body, still attached and rested on his shoulders. He was left to die a very slow death.

Being locked in a room with Taylor Swift music blasting 24/7.

Starvation,?

The Brazen Bull.

Discover the "Brazen Bull," the Ancient Greek Torture ...

www.openculture.com/2013/11/brazen-bull.html

Justin Bieber.

Putting me In a cell forcing me to listen to rap justin bieber or taylor swift for days I would commit suicide