The shoe fits perfect but you don't wanna wear it
You rather just lie in the form of appearance

from XV – Farewell Lyrics on Rap Genius

Meaning

The shoe fits perfect is a phrase meaning that you are who you are and were meant to be.
He’s saying that people are either following and trying to be like others making the fakes. Dressing up and acting like someone you are not.

For example a movie like Mean Girls where Lindsay Lohan is basically this cute nerd but is turned into a popular bitch by this clique of girls.

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