When I was about 7-9, (i’m 19 now), I remember glancing at the TV and seeing a group of teenage girls (3-4 of them) wearing school uniforms (though I’m pretty sure it was an American film. I’m guessing they were students at an all girl(?) Catholic school). I believe the uniform skirts were the stereotypical red and black, plaid ones. One of the girls looked at another one, and kind of scoffed at her uniform. She reached over to her and proceeded to roll up her skirt up at the waist to make it shorter. I think it was either a scary movie or drama movie. Something “Moth Diaries”-esque. I also believe the girl that rolled up the other girl’s skirt sported goth makeup. It may have been the other way around.
The Craft (1996)?
https://www.imdb.com/title/tt0115963/
I was just about to suggest that one. Here’s the trailer:
http://youtu.be/DoM4OXQVCcE
Or possibly All Cheerleaders Die (2013) . It’s a little recent for your timeframe, but it’s a remake of All Cheerleaders Die (2001).
https://www.imdb.com/title/tt2527186/
Solved! someone on reddit told me it was the Grudge 2 and I just watched it. It happens right after the into credits.
Glad you found it and thanks for letting us know!