When a celebrity or a new person gets WAY too much spotlight. This can cause a snobbish side to surface, and their friends or aquaintances to notice them acting differently. Otherwise, this causes the "showered" person to feel shy or be surrounded by people by simply going outside their house, making them annoyed.
After Jack's new speech on world matters, he got a media shower and became a different person; one his friends didn't know anymore.
Once Beth won the spelling bee, her media shower forced her to skip school for the next week.