Band Aid 30 - which is raising money for the Ebola crisis in West Africa - actually heard the many artists involved sing the entire song, but their individual lines were chosen at the end. Geldof was so impressed by some of the performances he wants to release them as stand-alone tracks.
He said: "There has to be individual versions of this. I was staggered by the voices.
"With Sam's version, Ed's version, you're just going to go, 'Wow'. They do it so different to what's in my head."
Bob also noted the "passion and rage" of Sinead O'Connor's version of the track in an interview with Capital FM.
At the beginning of the week Bob had a negative reaction to Sky News' Jayne Secker's question regarding the hypocrisy of some musicians taking part, given their tax aviodance in the past.
He said; "I think you're talking b******s".
Rick Sky has praised the crowd for giving up their time to raise the awareness around Ebola and how to fight against it.
During an appearance on Jeremy Vine's show on BBC Radio 2, the BANG Showbiz Managing Director said: "Yes there are loads of questions about tax, but we're straying off the point. I'm sure these people are donating themselves and the fact these people are giving their time is important. If you work out how much Bono is worth, if he spends a day in the studio that's worth a lot of money to him. I'm happy for Bono to give a million pounds to this cause and I wish he would. But we're picking on a group of people and castigating them for doing good, if you keep on castigating people they won't do good in the end. Millions and millions of people donating a pound each is maybe better than Bono donating a million pounds himself. Ultimately, Geldof has got up off his backside and has done something and hopefully we're getting somewhere."
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