The charity single sold more than 312,000 copies last week, making it 2014's fastest-selling single so far, reported BBC.
Singer Bob Geldof, who along with artists like Bono, boy band One Direction, Rita Ora and others recorded the song, thanked the nation and said he was proud.
The stars recorded the single as a part of charity supergroup Band Aid, which was founded in 1984 by Geldof, 63, and Midge Ure to raise money for anti-poverty efforts in Ethiopia by releasing the song 'Do They Know It's Christmas?'.
"I expected it, but did I expect it in such vast and willing numbers? No," he said. All proceeds from the song go towards the fight against Ebola in West Africa.