11. Billie Joe Armstrong's Meltdown

Last week, Green Day's Billie Joe Armstrong had a meltdown onstage at the iHeartRadio music festival in Las Vegas. After he was told he only had one more minute on stage, he went on a rant complaining that Green Day's set was cut short compared to other acts on the bill. At the end of it, he smashed his guitar. Not long after, his rep released a statement saying that he's "seeking treatment for substance abuse."