Here is a possible concise summary:
Tia is a girl who loves fashion and wants to become a designer. She has a best friend named Lillian, who is popular and kind. They have a pact to wear matching dresses for their prom. However, their friendship is tested when a new girl named Helen arrives and tries to steal Lillian from Tia. Helen also gives Lillian a stolen dress as a gift, which makes Tia angry. Tia and Helen have a fight at Lillian's birthday party, and Lillian stops talking to both of them. Tia and Helen later team up to find Lillian and apologize. They make up and go to the prom together, where Lillian is crowned prom queen and praises Tia's dress design. Tia gets a scholarship to fashion school and remains friends with both Lillian and Helen.
Here are some key facts extracted from the text:
1. The narrator's name is Tia and she has a passion for fashion design.
2. Tia's best friend is Lillian, who is popular, smart and kind.
3. Tia has an overactive sweat gland, which makes her sweat a lot and feel insecure.
4. Tia and Lillian promise to wear matching dresses for the prom, designed by Tia.
5. Helen is a new student from Paris who tries to befriend Lillian and steal her from Tia.
6. Helen gives Lillian a stolen dress for her birthday, which causes a fight between Tia and Lillian.
7. Tia and Helen reconcile and find Lillian, who is upset and hiding in Tia's house.
8. Tia gives Lillian a dress she made for her and they go to the prom together, where Lillian is crowned prom queen.
9. Helen becomes friends with Tia and Lillian and they support Tia's dream of going to fashion school.