Tina was wearing too much make-up, and her hair was blond. The really weird thing, though, was that if she squinted her eyes and didn't really focus on her face, she kind of looked like ... what was her name? She pondered for a moment, then the name came to her - Sarah McMillan! Wait, how come it took so long for her to remember Sarah? She was only one of the most well-known girls at school. Wait a minute, why did she look like Sarah?
What Tina failed to realize was that she was being changed to become Sarah McMillan's replacement. And being such an impressionable young woman, Tina was going to end up being even more bitchy than Sarah was. After all, Susan McMillan (her mother) was quite a bitch.