Veteran pop star Boy George has hit out at Madonna for her ambitious streak and insists the "Material Girl" is as cold as ice.

George, 43, has a bitter and long-running feud with the famously business- minded Madonna and has previously admitted to being jealous of the megastar, celebrity portal Femalefirst reported.

"If Madonna were a drag queen, she would be called 'Ruth Less'," he said. "I don't think the word warm comes to mind with Madonna. Ice is the word that springs to mind."