I'd say:
1. Blackout
2. In The Zone
3. Britney
4. Glory
5. ...Baby One More Time
6. Oops!...I Did It Again
7. Femme Fatale
8. Circus
9. Britney Jean
Femme Fatale is a great album and a lot better than the albums being peddled by Kesha, Bey, Taylor, Gaga, etc. at the time, but it just lacks her personality. I'd say she has 6 amazing albums, a great album and a good album.
As an era, FF was trash. It lacked a cohesive image and and didn't experiment or help push her brand.
This is basically my list but I would place Oops!...I Did It Again higher since it's one of her most cohesive albums.
There's no excitement, there's no passion... I have really good days, and then I have bad days. Even when you go to jail, you know there's the time when you're gonna get out. But in this situation, it's never ending. It's just like Groundhog Day every day
Sorry but Migugly and Constipating don't mean ****. They literally hate a 3rd of Britneys discography. FF is still a great album and most of the Army agree. Stay pressed you right wing nuts