Wednesday 15th August 2012 by Michael Baggs | Photos by Splash

Tags: Elton John

Elton John pranked Batman actor Michael Caine yesterday, as he 'mooned' the star as their yachts passed on the French Riviera.

The outspoken star is holidaying in France with his partner David Furnish and a group of male friends (including rising British pop singer Bright Light Bright Light), and pulled his pants down to shock Caine as their luxury vessels passed. See the photos below - if you so wish.

Earlier this week, Elton John was playing host to Britain's Got Talent judge David Walliams, who pulled the same prank on Simon Cowell as he passed in his own private yacht.

It's not just his backside Elton is unable to keep to himself at the moment, having recently revealed his opinions on Madonna and her attention-grabbing tour antics.

“Why is she such a nightmare?" Said Elton, reported The Sun newspaper. "Sorry, her career is over. Her tour has been a disaster and it couldn't happen to a bigger c***.”

“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****** fairground stripper. She's been horrible to Gaga.”