OMG! It was the BEST CONCERT EVER when One Direction and their friends from 5SOS had a pie fight on stage! Check out that pic of Harry Styles covered head to toe in "custard pie." And don't miss the video below. Louis Tomlinson gets a little aggressive! (It's hilarious!)
Directioners, what's the funniest thing that 1D has ever done on stage? Tell us in the comments!