Madonna made a surprise appearance at Ultra to promote her new dance album which came out Monday. But it was her reference to the rave drug ecstasy that has one of the hottest DJ-producers in the electronic dance music industry raving mad. "I have a question for you, how many of you in this crowd have seen Molly?" Madonna asked the sellout international crowd. If you aren't hip to the slang, Molly means ecstasy. The crowd erupted in cheers. Deadmau5, one of the leading electronic music artists, slammed the Material Girl Monday for glamorizing the drug, calling it irresponsible behavior on Twitter and Facebook.