Question: Sir Peter Thomas Blake, is an English pop artist, best known for co-creating the sleeve design for the Beatles' album "Sgt. Pepper's Lonely Hearts Club Band", his other best known works include the cover of which Band Aid single, a song written in 1984 by Bob Geldof and Midge Ure in reaction to television reports of the 1983–85 famine in Ethiopia?
Answer: Do They Know It's Christmas?