pin-up

A photograph, printed in a magazine or other publication, of a sexually attractive person (often nude or provocatively dressed), and intended to be removed and pinned up on a wall.

pin-ups on every wall of their dorm room

The person so depicted.

pin-up girl

Damn, she could be a pin-up, for real.

A figurehead, a person who represents an idea, cause, etc.

She was Nicolas Sarkozy's pin-up for diversity, the first Muslim woman with north African parents to hold a major French government post. But Rachida Dati has now turned on her own party elite with such ferocity that some have suggested she should be expelled from the president's ruling party.