Interestingly, Bowie was never really that successful. The sheer volume of his discography meant he sold a lot but he only had two #1 American Hits (Fame & Let's Dance), six #1 UK Hits (Space Oddity (after a reissue), Ashes to Ashes, Under Pressure (although this
was Queen's song), Let's Dance, Dancing In The Street and Heroes (this was the X Factor finalist performance

but he is credited)) and his biggest selling album was Let's Dance which shifted only 8 million copies.
It's only with hindsight that has he become the force we realize he has been. As we look back we realize how much he had affected the music-scape. His music was always really good but it was never appreciated as much as we appreciate it now. What helped is that we remembered his character, his avant-garde and his wierdness and that is what kept him moving forward.