The claws are out!

Elton John isn't the biggest fan of Madonna, and he let the whole world know during an interview on Australian news channel Sunday Night, where among other things, he blasted the pop icon for her catty treatment of Lady Gaga.

"She's such a nightmare. Sorry but her career is over. Her tour has been a disaster and it couldn't have happened to a bigger ****," adding, "She looks like a f***ing fairground stripper. She's been so horrible to Gaga."

The Rocket Man has obviously taken sides in the Lady Gaga vs. Madonna feud, which started after Madonna implied Gaga's hit "Born This Way" was a remake of her hit "Express Yourself."

The Mother Monster is godmother to Elton and his partner David Furnish's son Zachary, so it's very clear where Mr. John's loyalty lies.

We're waiting for a jab from the Material Girl!