Former Iron Maiden frontman Paul di Anno is one of the baddest singers out there; he recently stopped the show at a concert in Ukraine after a member of the audience kept shouting Bruce Dickinson’s name. Di’Anno said: “I’m sorry – I don’t do opera,” and mimicked Dickinson’s vocal on ‘Run To The Hills’. He added: “It’s too f–king easy – and I’m not gay.” But he was just started. “This is punk. If you…