Thursday 21st June 2012 by David Renshaw | Photos by WENN.com

Deadmau5 has reignited his war of words with Madonna, calling the pop star 'Grandma' and telling her off for mentioning drugs at a recent concert. 

The Deadmau5/ Madonna row erupted earlier this year when the producer and DJ criticised Madonna making reference to 'Molly' (a slang name for Ecstasy) at a live concert. 

Standing firm on his viewpoint, Deadmau5 told Rolling Stone that he sees the negative effects drug use has had on the dance music community being as serious as slavery. 

Speaking to the magazine aboout his feelings for Madonna, Deadmau5 said: “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.”

Adding: “I understand she has millions more fans,” he continued, “and is way more successful than I’ll ever be. But it’s like talking about slavery at a fucking blues concert. It’s inappropriate.”

It wasn't just Madonna in Deadmau5's line of fire, he turned on his fellow DJ David Guetta and accused him of being a fake when performing live. ”David Guetta has two iPods and a mixer and he just plays tracks – like, ‘Here’s one with Akon, check it out!’”

Meanwhile, Madonna found herself at the centre of a row involving money when a bar in Rome claimed she left their establishment without paying a bill worth £1000. 

Below: Madonna - MDNA tour in photos