[Gstar]

Originally Posted by Smithy

But the decline in album sales make Adele's numbers all the more impressive

I agree with this but Britney's was also impressive, going back to the point I made about the lack of online presence, she probably got all those sales through TV adverts, or a billboard here or there. 15 years later the industry has completely changed, yes there is a decline in sales, but promotion wise (digital and online) has increased immensely.