I was a little cheeky with the actual incorrect quotation, as it is one that is generally believed to be said but there is no proof that it was ever uttered by the person in question. And that quotation is:
Dramatic Drum Roll
"Let them eat cake" Marie Antoinette.
For a start Revolutionary France they would have eaten Brioche which is like a biscuit baked a few more times. Secondly, and more importantly it is believed to be Anti-Royalist propaganda (Simon Schama, "Citizens" and Ruth Scurr, "Robespierre: Fatal Purity"). At the time Marie Antoinette was unpopular for being Austrian and being embroiled in what was known as the Diamond Necklace Affair so she was an easy target. After the Revolution she was accused of abusing her children - without the benefit of that annoyingly pesky evidence. Louis XVI was executed and a few weeks later she was sent to the Guillotine. Her last words being, "pardon monsieur I meant no offence" as she accidently stepped on the executioners foot.
Sop there you go.