Recently, JP Morgan, Billboard and Soundscan have calculated the top US selling artists since 1991. Nestling in tenth place (behind the likes of N Sync, Kenny G and the Backstreet Boys!) is Pink Floyd who have shifted 26.6 million "units" in the US since 1991. At the top of the list are Mariah Carey (40.4 million), The Beatles (42.2) and Garth Brooks (an astonishing 63.9!)