I don't know too. But Beyonce sure likes to copy her (and a lot others) a lot.
I mean.
Britney Stealing = Beyonce stealing MORE
Britney being white = Beyonce being whiter than her
Britney Lipsynching = Beyonce lipsynching
Britney Aging horribly = Beyonce aging horribly
I wish these 2 girls would catch a break. They're not even releasing and ATRL is on them.