Australia's finest Pop Punk exports (yes, they are pop punk, stop complaining) started out life on YouTube, before rising to fame on tour with boyband goliaths One Direction.
Ashton, Michael, Luke and Calum have since churned out a string of solid gold bangers including 'She Looks So Perfect', 'Don't Stop' and Ghostbusters-soundtracking anthem 'Girls Talk Boys'. They even have their own record label, recently signing up Hey Violet who are also really rather good.
Fun fact: Bass player Michael Clifford was the original inspiration behind classic children's book series "Clifford The Big Red Dog". He does not, however, receive any profits from the franchise.