Which word best describes acting as a go-between for bitterly arguing opposing sides?
interfering
intruding
interrupting
mediating

Mediating is the answer you are looking for.

jessica, a teenage girl who just wants popularity, does everything to get attention. she puts her hair in a bun and steals her mom's lipstick and such. but then she takes something and it makes her inside and outside appearance  go bad.

i just came up with that in less than 60 seconds, but tweak it up if you like it.

explanation:

you didn't give a theme but i did a question like this a while ago so i hope this is what you were looking for.