Madonna has confessed to taking highly-addictive painkiller Vicodin.

The sexy singer has confessed she took the prescription drugs - which Matthew Perry and Eminem were famously hooked on - after injuring herself in a horse riding accident.

But the star says the drug turned her into a "complete bitch" and she vowed never to take it again. She said: "I only tried Vicodin once."

"I was in a lot of pain, and everyone kept telling me to try it. But they kept saying, 'Be careful. It's so amazing. You're going to get addicted.' So I called five people to get advice before I took it, and they all told me I was going to love it."

She added to America's Rolling Stone magazine: "I just chewed the entire inside of my mouth. I bitched at everybody. And I was in more pain. It was the worst experience of my life."