Madonna has branded musician Ariel Pink a "crazy person" after he boasted that he had been recruited to write songs for her new album.

Pink alleged in an interview last year (14) that the Material Girl's record company staff had contacted him asking for contributions to her new album, Rebel Heart.

Her manager was quick to address the comments, insisting he and the singer had not even heard of Pink, and now Madonna has spoken out, insisting she had never considered a collaboration.

She tells Mojo magazine, "He's a crazy person. I never met him. I never considered working with him. I don't know where he got that idea. It's possible somebody brought his name along with a million other names to me as people to write with. But I never stopped at his name, considered him and then said no."