Wear something pink and blue. You can wear a pink blush then match it with blue eye shadow would surely give you a cool and cute vibes.
Being in a 50’s can be cool too:
Pin up aesthetic eyeliner then wear a rose pink colored lipstick. But I think it will not work on me, for goodness sake I am already in my late 30’s so if I would wear something like this, I would look more old but I am telling you this will work with our teens!
You want to achieve that Elsa look in Frozen? Who don’t I mean it would be perfect since costume party is approaching, you might be interested on this. Apply a makeup that has cool toned highlighter. Put it on the tip or the high points of your cheekbones.
Look good, be cool this month!