"Everyone Knows Juanita" is is a song from the Disney/Pixar film Coco. It is a song performed by Héctor, which he sings to Chicharrón in exchange for Chicharrón giving Hector his (Chicharron's) guitar.
Well, everyone knows Juanita
Her eyes each a different color
Her teeth stick out and her chin goes in
And her...knuckles, they drag on the floor
Chicharrón: Those aren't the words!
Héctor: There are children present
Her hair is like a brier
She stands in a bow-legged stance
And if I weren't so ugly
She'd possibly give me a chance