Madonna has denied that an accusation that she glamorised drug use after she was criticised for comments that she made on stage in the US.
The singer, 53, sparked controversy when she asked "how many people in this crowd have seen Molly?", which is used as slang for the drug MDMA or ecstasy, taken by some dance music fans.
She made the comment as she introduced the performer DJ Avicii to the stage at the Ultra Music Festival in Miami.
Dance DJ Joel Zimmerman, known as Deadmau5, branded the singer an "idiot", writing on his Facebook page: "Very classy there Madonna... such a great message for the young music lovers at Ultra.
The Canadian DJ then tweeted Madonna - who joined Twitter for one day on Monday to answer questions from fans:
@madonnamdnaday You're a role model to 100's of millions. You have a powerful voice,EDM could use your positive influence, not "molly" talk.
But Madonna, denied that she was referring to the drug.
Posting a picture of herself wearing Minnie Mouse ears, she wrote to the DJ, who performs while wearing a plastic mouse head:
"From one mouse to another. I don't support drug use and I never have.
"I was referring to the song called Have You Seen Molly written by my friend Cedric Gervais who I almost worked with on my new album."
When the DJ wrote "respect for clearing it up personally", the Queen of Pop added:
"Communication is always best. You should have called me first, we could have cleared it up 'privately'. See you on the road."
The DJ wrote back: "Sure. regardless, just be a little more aware of what you should represent ... and I'll watch my mouth."