5 Seconds of Summer (commonly abbreviated as 5SOS) are an Australian pop punk band from Sydney that formed in 2011. The group were originally YouTube celebrities, posting videos of themselves covering songs from various artists during 2011 and early 2012. They rose to international fame while touring with One Direction on the Take Me Home Tour.

The group have been referred to as a boy band in the media, though the members reject this description. In early 2014, the band released "She Looks So Perfect" worldwide as its debut single, which topped the charts in Australia, New Zealand, Ireland and the United Kingdom. The self-titled debut studio album was released in June 2014, which peaked #1 in 11 countries, and followed by a live album titled LiveSOS. The band released their second album Sounds Good Feels Good in 2015.