Dubstep duo Nero will be opening for Madonna on her MDNA Tour on some North American dates. I'll be seeing them in Philly and Atlantic City, but no NYC dates are listed. The last time I think Madonna had a proper opener in the U.S. that I saw, it was Technotronic (Blond Ambition), no? I remember Crowded House Level 42 (Who's That Girl) opened for her, too. And, of course, The Beastie Boys (Virgin).