The message: "GIRLS JUST WANT GLITTER." That's it. That's really all they want. All girls. Just get them some glitter already.
For the record, I don't hate glitter. Or kittens. Or rainbows. And I, myself, have been a bride, I sing, I dance (poorly and thus, only with our kids, with silly, wild abandon) and I enjoy being a wife and mother.
Of course girls can aspire and like any or all those things AND be smart, like math, run fast, etc. But when those things are pitched on clothing made for girls as the ONLY interests or aspirations of ALL girls, and the market is saturated with that sentiment, that's when fashion fails us. The undertone is so... dumb. And that is something YOU are not. You, are so much more.
So absolutely, get your glitter on. Hug those kittens. Be beautiful (because you are). But also, embrace your strengths, support each other, and work hard at being good at something that gives back to the world.