Bob Geldof has reminisced on 40 years of the iconic song 'Do They Know It's Christmas' following the release of Band Aid 40. Speaking to ITV News, the singer said: "It's so beautiful a track - it was a scratch song that we came up with that would last a couple of weeks and we'd make some money and give it to Oxfam. I saw an American newspaper previewing this a couple of weeks ago calling it the most impactful song in rock and roll." Report by Kennedyl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn