Eminem has gone back to his roots and collaborated once again with the iconic rapper Dr. Dre on 'I Need A Doctor'. The pair appeared together on the 1999 single, 'Guilty Conscience', and have maintained a close working partnership ever since.

A rough version of Dre's new single, which is due for a February 1 release, appeared online a few months ago but now the final cut has appeared. 

'I Need A Doctor' also features Skylar Grey who performed on Diddy - Dirty Money's 'Coming Home' recently. She also helped write Rihanna and Eminem's hit 'Love The Way You Lie'. In a YouTube post earlier this month, Dr. Dre announced that his forthcoming album, 'Detox', would be released on America's National Weed Day, April 20, but nothing official has yet been confirmed. 

Check out Dre's forthcoming single and heavyweight collaboration here: