The paper says 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.

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

“Elton and Robbie have had their disagreements over the years. But they are best pals again now,” “a source” reportedly told The Star. “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.”