I love Britney Spears, all her records have been great.
I just realized something now. And maybe this is kind of like a conspiracy theory. But, it appears they have been speeding up her vocals, to make her voice sound baby-like. If you look at older performances, her voice is a lot thicker, and to me, beautiful.
This would explain why she rarely sang live. Even at that VMA 03 performance, her part was lipsynched. And she definitely can sing, so that would kinda explain it. Isn't that interesting? I think so..