[He sees the interest. It only makes Mettaton preen more.]

Sweetheart, my act is whatever people need it to be! [He's tossing glitter into the air. Don't worry about where he grabbed it from.] I was the sole source of entertainment back home - I've done it ALL.

...Why? You wouldn't be hoping for a sample, would you? [He winks. Considering the hair completely covering his right eye, it may as well just be a blink.]