R.E.M's version of John Lennon's #9 Dream, the lead single from the soon-to-be-released album, Instant Karma: The Campaign To Save Darfur has been selling briskly on iTunes in the US.

The single is the number one most added song at AAA radio stations in the USA and has moved into the top 30 on both the UK and Irish singles' charts.

Proceeds from sales of the single will go to Amnesty International's Campaign to Save Darfur.