English Art/Literary Idioms / Maxims / Sayings

I am looking for a fixed phrase related to being (over) elegant used when somebody appears at a place dressed better than expected, e.g. team-building event in the woods and somebody who wants to impress others appears wearing their best clothes (or at least not to the occasion - e.g. high heels and a mini skirt, or a white suit).
Ideally (1), the phrase should fit also any product or appearance that is too elegant for the occasion - e.g. exclusive wine / champagne for lunch, a hairdo.
Ideally (2), it should rhyme :-)
Ideally (3), it should have the word "France" in it (in Polish - the source language the fixed phrase is "elegancja-Francja" (which means "elegance-France"), hence the rhyme requirement...). The phrase is used as a short exclamation (for lack of a better word) understood as ironical by all, but the overdressed person (C) who hears flattery, e.g.
A: Look at him and his sunglasses / suit.
B: ...........................
C: Just got them from Harrods.

I have one phrase in my mind, but would not like to suggest anything (but will post it later).