Madonna, Deadmau5 Madonna, Deadmau5

Electronic dance music star Deadmau5 says he's still mad at Madonna for a comment she made at the Ultra Music Festival in March.

In the new issue of Rolling Stone, Deadmau5, whose real name is Joel Zimmerman, says he's still peeved at the "Vogue" singer for asking the crowd if they've seen "Molly" — slang for Ecstasy.

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"You want to be 'hip' and 'cool' and 'funky grandma'? Fine. It's not my place to say you're irrelevant. If you're gonna come into my world, at least do it with a little more dignity," he said. "I understand she has millions more fans, and is way more successful than I'll ever be. But it's like talking about slavery at a f---ing blues concert. It's inappropriate."

This isn't the first time Zimmerman has addressed Madonna's "Molly" comment. In March, he tweeted, "You're a role model to 100's of millions. [Electronic dance music] could use your positive influence, not 'molly' talk." Madonna then clarified that she wasn't referring to the drug, but the song "Have you Seen Molly" by Cedric Gervais. "I don't support drug use and I never have," she added.