The gadget that stretches your mouth to make it bigger is popular among Japanese women. The idea is that bigger mouth makes your face look smaller and thus more attractive. Apparently, for the same reason Hollywood women often apply lipstick in a way that makes their mouths look bigger. So in Japan or Hollywood, it's considered a compliment to say to someone: "My, what a big mouth you have!"
Mick Jagger gets most compliments.
Photoshop celebrities or politicians with big mouths. Let's show how big their mouths can really be.
Don't forget to include the celebrity names in your entry titles.