emmanuel, your post is so awful. Avril is NOWHERE near artist of the decade, her 3 albums did good but she's not artist of the decade.
Britney's 3 albums were blockbusters and they all came from this period, Blackout is kinda underperforming but it still has time to turn around and its pretty much gonna pass the 1 million mark which will confirm that she is the artist of the decade. Britney was a PHENOMENON from 1998-2004. Even now, she's still getting record hits just not as big as she used to.