The three Victoria Martin books written by Francine Pascal all feature Seyfried on the cover, and my favourite is for My Mother Was Never a Kid with half of her hair crimped and half straightened. These titles were originally published in the eighties but they must have been repackaged in the nineties because Seyfried is 23. Oh, no, I just looked down and saw that they were repackaged in 2003. And apparently she starred in Mean Girls just soon afterwards (she is 11 on these covers).
Hanging Out With Cici was Pascal's first YA novel and it was later renamed My Mother Was Never a Kid after it was televised. AND it's actually a time-travel book as Victoria Martin goes back in time to see her mother at her age. Here's what one person on goodreads.com wrote about this book:
The creator of Sweet Valley High digs deep in this fantasy about a girl who gets caught passing a joint, bumps her head, awakes in the 1950's and befriends the one person on earth she can't tolerate: her mom.
Many people mention liking the Victoria books better than Sweet Valley High! It's funny because I often wonder who is on the cover when books decide to package with photographs of people. Obviously most are just teen models, but I often want to know who these people are!