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The Capital Late Show with Marvin Humes 10pm - 1am
27 January 2015, 15:19 | Updated: 27 November 2018, 11:23
Prove how much you love Ashton, Calum, Luke and Michael by taking our ULTIMATE 5 Seconds Of Summer quiz!
Do you know Aussie four-piece 5SOS' deepest, darkest secrets?
Have you been an out and loud member of the 5SOSFam since the very beginning?
Take our Ultimate 5 Seconds of Summer Quiz and prove that you really are the biggest fan in the world!