5 Seconds of Summer began in December 2011 when Luke Hemmings, Michael Clifford and Calum Hood, who all attended Norwest Christian College, started posting videos of themselves performing covers of popular songs together on Hemmings' YouTube channel. Hemmings' first video, a cover of Mike Posner's "Please Don't Go", was posted on 3 February 2011.[9] Their cover of Chris Brown's "Next to You" received over 600,000 hits.[10] In December 2011, they were joined by drummer Ashton Irwin,[11] and the four-man line up was completed.[12]
The band attracted interest from major music labels and publishers, and signed a publishing deal with Sony ATV Music Publishing.[13] Despite having had no promotion apart from onFacebook and Twitter,[13] their first music release, an EP entitled Unplugged, reached number 3 on the iTunes chart in Australia[13] and the Top 20 in both New Zealand and Sweden. Their international following increased significantly once again when One Direction member Louis Tomlinson