Sir Elton to appear on new Eminem LP?

Speculation has mounted that Sir Elton John has collaborated with Eminem on his new album Relapse.

The British singer reportedly spent half a week in the same Detroit studio where Eminem was recording his LP in October.

The pair previously performed together at the Grammy Awards in 2001 and have since expressed an interest in recording a duet.

"No-one realised the significance, though the Detroit Free Press did mention that Elton had been in town," a source told The Independent.

"Elton really gets his music. Anything they produce will be total dope: some of Em's biggest records have been collaborations with mainstream pop stars - Dido on 'Stan', for example - and they really don't come much bigger, or more mainstream, than the man with the red piano."

Eminem will release Relapse in spring. Single 'I'm Having A Relapse' will precede the LP.