Eminem has further fuelled speculation he is set to announce his retirement with the upcoming release of a greatest hits collection called CURTAIN CALL.

The WITHOUT ME rapper was forced to cancel the European leg of his Anger Management III world tour with 50 CENT when he was admitted to rehab to battle an addiction to sleeping tablets in August (05), prompting rumours Encore would be his last studio album.

And the release of Curtain Call later this year is seen by many music industry insiders as a clear indication Eminem intends to focus on production work in the future.

The 32-year-old says of the record, "I have some songs that a lot of people like. I have some songs that only I like. This album is obviously for the 'lot' of people."