Elton John is convinced Madonna's career will be over after her current tour.

The "Material Girl" is currently performing shows across the world as part of her MDNA tour and John turned the air blue during an Australian TV interview when he jumped to the defense of Lady Gaga, his son Zachary's godmother, over claims the singer copied Madonna's music.

He tells music mogul Molly Meldrum on Australia's Sunday Night show, "Why is she such a nightmare? Sorry, her career is over. Her tour has been a disaster and it couldn't happen to a bigger c**t... If Madonna had any common sense she would have made a record like 'Ray Of Light' and stayed away from the dance stuff and just been a great pop singer and make great pop records, which she does brilliantly."

"But no, she had to go and prove... she looks like a f**king fairground stripper."