Madonna said she suffered whiplash in her fall during her performance at the Brits Awards but denied rumours that it had been a publicity stunt.
Speaking during a recording of ITV's Jonathan Ross Show, due to be aired next month, the 56-year-old described the incident as a "horror show".
She said "I didn't hurt my butt but I hurt my head. I had a little bit of whiplash, I smacked the back of my head. I had a man standing over me with a flashlight until about 3am to make sure I was compos mentis."
Watch a snippet from the show here:
The interview will be broadcast on The Jonathan Ross Show Madonna Special on ITV on Saturday March 14.
During the exchange, the singer added:
Echoing a meme from The Incredibles, used by many Twitter users following the tumble, Madonna vowed: "No more capes".
Credit: The Jonathan Ross Show Madonna Special, Saturday 14 March