Christina: yes, sort of, during her "Dirrty" era and all the way up to "Ain't No Other Man". I mean, I bought her albums and singles, but I didn't get into any cat fights with Britney stans over who had more "in packed"
From Back To Basics up to now!
I was always a fan, but it definitely got serious for me in 2006-2007.
I'll always stick with her. Her music has helped me so much in life, including Bionic/Lotus.