Some (Japanese) idols were spanked by mask man in the ai-league.
This ai-league is the TV show for training a new talent.
And sometimes,they were be punished as a penalty game.
episode05,19:30-
http://www.youtube.com/watch?v=jSMGBPlGtZw
episode13,23:20-
http://www.youtube.com/watch?v=rHzCUUqCYUY