She spent her whole time at high school avoiding Sandy and treating him with total contempt but as soon as she and Romy find out he's really rich suddenly they're all over him (doing the most ridiculous dance).
Yes I know IABU by posting this but this was my teen film, the one which I would watch and fantasize about sticking two fingers up to the bullies.
Now as an adult thinking about the film and its message that good people 'come out on top', well Michelle and Romy aren't good people. So now what is the message? Be an immoral person because that will get you everywhere?