Only on ATRL is 'Toxic' a classic.
Britney has zero classics.
She was only relevant, musically, for one year (even banned from performing at the Grammys after 2000),
'Oops! ... I did it again' spent 3 weeks in the top 10. Her 3rd and 4th lead singles didn't make the top 10 at all.
The majority of her career was spent as Paris Hilton-esque socialite providing tabloids with an arsenal of daily content.
When people take the time to reflect upon early 2000s pop culture, they only remember her as a joke
(arguably less respected than any member of the Kardashian Klan).