It was probably late 80s early 90s, this teen or tween girl would always change her outfit as soon as she got to school - she'd leave the house in something boring to fool her parents, and then as soon as she got to school she'd change into like a mini and a boob tube and frizzy hair..

Then one day she forgets that it's Yearbook Picture Day but she's already changed into her 'cool' outfit and it's too late to change so she ends up getting photographed like that. The camera keeps clicking even as she's getting up from the chair.. :)

I remember ONE line from the movie and one line only, something her friend says to her in the cafeteria: "--and that girl is 100% pure polyester."

NOTE: It's not that episode of Degrassi Junior High.. :)