Is this for actual physical album/cd sales, if it is it makes sense that people aren't buying physical music these days. I'm sure a lot of the current "in things" are selling millions of digital singles and albums.
"More than 32 million new cumulative certifications were awarded today including a 9x multi-Platinum for Firework, two 7x multi-Platinums for California Gurls and E.T., three 6x multi-Platinums for Dark Horse, Hot N Cold and Teenage Dream and more. Katys career RIAA tally now encompasses 18 Gold, 16 Platinum and 56 multi-Platinum Digital Single Awards, in addition to her 2x multi-Platinum album Teenage Dream and Platinum album One Of The Boys.
I'm sure she's not selling too many vinyl's or cassettes either..........or wax cylinders.