Elton is said to have asked his friend Robbie, 32, to perform on the night and make the day extra-special, and the 'Angles' singer has obliged by offering to do a striptease while performing classic Tom Jones hit 'You Can Leave Your Hat On'.

A source told Britain's Daily Star newspaper: "Robbie knows this is one gift Elton won't be able to out do. The pair love to shock each other, so Elton will probably already be cooking up something for Robbie's birthday next month."