Hey kiddo, have you ever watched a movie or a TV show and saw someone famous appear, but only for a short moment and not really have anything to do with the story? That's called a "cameo appearance"! It's when someone famous appears in a movie or TV show for a brief moment just to say hi or make a small cameo, like a surprise visit.
Think of it like a special guest showing up to your birthday party, but they only stay for a few minutes and don't really do much except say hello and give you a present. Cameo appearances can be really exciting because you never know who might show up, like a famous musician, actor, or even a sports star! Sometimes directors or producers add a cameo appearance as a fun little surprise for viewers or as a nod to other movies or TV shows.
So next time you're watching something and a famous face pops up for a quick hello, you can say "Hey! That's a cameo appearance!" and impress your friends and family.