5 Seconds of Summer is an Australian pop rock band formed in Sydney in 2011 by Luke Hemmings, Michael Clifford, Calum Hood, and Ashton Irwin. The group initially gained attention through YouTube cover videos before rising to international prominence while touring with One Direction. Their 2014 self-titled debut album established them in the pop punk scene, followed by albums including Sounds Good Feels Good (2015) and Youngblood (2017). Known for guitar-driven pop rock performances, the band has released multiple studio albums and conducted headlining world tours, building a substantial global fanbase.