This must be a true story because everyone knows I don't tell lies (well, not very often). Louis, not Louis XVI, but Louis, hairdresser to the artistocracy, fell foul of the revolutionaries. He dressed as a woman to conceal his true identity but couldn't bear to give up his neat moustache and goatee and that proved to be his downfall.
I Googled a painting of Marie Antoinette (now greatly altered), a man's face (also altered) and the guillotine. Backgrounds and butterfly by Lori Davison at Scrapbookgraphics.