People crave for a different female to carry on a teen-eage tune.
I know it isn't really related (mostly because Carly actually isn't a teen like Britney was) but that song has the light and breezy flair of Baby One More Time, as far as target goes.
Except that BOMT was actually a sort of "sad" song, while this one is bold and confident.
It's gonna get interesting. Public is clearly very receptive and I'm curious to see if she will really hit number one (she has a high hill to climb yet, and we will see if she can sustain her lead, but Summer is Unpredictable

)