"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks
FWIW, back when I had to wear uniforms (including one remarkably like the one in the photo, only in brown), it was normal to wear pants under them when the weather was cool or cold and shorts in the summer. We'd take off the pants at school but the shorts stayed on all day. Eventually leg warmers came along and replaced the need to wear pants under our uniform skirts.
Hahahahahahahaha!!! Not in my experience. Even with a uniform there are very clear fashion do's and don'ts, and Lord help the girl who doesn't comply. There's skirt length, brand of shirt (yes, the brand of plain white shirt was important), brand of shoes (much less of an issue in the school I went to where you could only wear one type of shoe from one supplier), brand and style of coat, purse, backpack, hair accessories, jewelry, etc. It was brutal. And because in private schools the students often come from families with a lot of money, I think the pressure is even greater (I went to public school through 4th grade and didn't see anything like the peer pressure there that I did in private school), and harder for the kids who were there on scholarships who didn't have the wealthy background.Maybe she went to an all-girl's private school where there MIGHT be some less pressure on the fashion stuff in some girl groups.
P.S. That's an awesome Nutcase helmet she has on.