The Rapper: 50 Cent
When He Got Booed: At the Reading Festival in Britain in August 2004
Why It Happened: The crowd started to throw bottles at the stage in the middle of 50's show and he didn't like it. So, he chastised them. And, of course, that only caused them to throw more bottles on stage, which forced 50 to flee. That caused the crowd to boo relentlessly and to—you guessed it!—throw more bottles onto the stage.