Unseen history on Instagram: "At the 2012 Nickelodeon Kids’ Choice Awards, Katy Perry was involved in one of the most chaotic and hilarious moments in the show’s history when Nickelodeon’s signature slime stunt went wildly overboard. While presenting an award, Perry was unexpectedly blasted with an enormous wave of bright green slime—far more than usual—slamming into her with such force that it visibly knocked her off balance and left her momentarily stunned on live TV. The moment instantly went