Top 20 Onstage Freakouts By Musicians

During some of the most unforgettable moments when a singer or band member snaps during a performance - whether due to provocation or seemingly out of the blue. Our list features Kanye West, Justin Bieber, Axl Rose, Nickelback, Rob Zombie, and others. Which reactions do you think were reasonable? And which ones were just over the top? Share your thoughts in the comments.