By Melina Scarfo...Sydney pop rock band 5 Seconds of Summer drew a large crowd to the Adelaide UniBar on Thursday night for the fourth date of the ‘Pants Down Tour’. Since their formation in December 2011, Luke Hemmings, Michael Clifford, Calum Hood and Ashton Irwin have gained a massive following online, released their debut EP and toured with One Direction. Quite impressive for a band who started by uploading covers to YouTube.