Pop prince Robbie Williams will apparently strip off for Elton John at his 60th birthday bash.

The singer has agreed to recreate a striptease performance from hit film The Full Monty for his pal at the Madison Square Garden celebration in New York, reports the Daily Star.

The special gig on March 25 will culminate in Williams getting his kit off to Tom Jones' You Can Leave Your Hat On.

A source told the paper: "Elton and Robbie have had their disagreements over the years. But they are best pals again now.

"And they always try and outdo each other when it comes to presents.

"Robbie knows this is one gift Elton will have difficulty living up to.

"But the pair love to shock each other so Elton will already be cooking up something bizarre for Robbie's birthday next month."

The Stoke-born singer is well known for taking his kit off - in 2000's Rock DJ the video featured him in a roller-disco as he stripped nude and then proceeded to strip off his own flesh, muscle tissue and organs until he was a dancing skeleton.