With huge guitars and hooks, Australia's 5 Seconds Of Summer are one of the most exhilarating teen rock acts in recent memory. "She Looks So Perfect" exemplifies their shout-along power pop anthems. Charlie Simpson supports. Doors open at 6pm; entry not guaranteed after 8pm. Tickets are limited and will start popping up from 11am two days before the event. Tap below to get on the waiting list and we'll send you a notification 20 minutes before they become available – they go quick, so get ready and keep refreshing the app. Don't worry if you miss out; there may be more closer to the show. Please note! You need to update to the latest YPlan, which is required to enter the Roundhouse. iTunes performances can be watched live or on-demand by millions of iOS users around the world on their iPhone, iPad or iPod touch and iTunes on their computer or in stunning HD with Apple TV. Visit www.itunes.com/festival for more information. Join the conversation using #itunesfestival.