A media circus is when a lot of attention is given to an event or a person. People sometimes call it a "circus" because it's like an imaginary circus with cameras, reporters and other media people buzzing around the event or person like a swarm of bees. They take pictures, ask questions and write stories about it, often trying to find out as much as possible about it. This extra attention by the media can be helpful in highlighting important people, causes, or events but it can also be a bit overwhelming and distracting from the actual purpose of the event or person.