Oh, Ashton Irwin! The 5 Seconds of Summer drummer had a very interesting wardrobe choice for last night's show... He wore this Teenage Mutant Ninja Turtles costume to the concert and he totally rocked it. " Last show of WWA rocked, beautiful memories have been made, and I am forever thankful :)," Ashton wrote on Instagram.
Tell us in the comments: Which 5SOS guy is your all-time fave?