5 Seconds of Summers

5 Seconds of Summer (5SOS) is an Australian pop-rock band formed in Sydney in 2011, consisting of Luke Hemmings (vocals/guitar), Michael Clifford (guitar/vocals), Calum Hood (bass/vocals), and Ashton Irwin (drums/vocals). Rising from YouTube fame, they achieved global success with hits like "She Looks So Perfect" and "Youngblood," becoming the first Australian act to have their first three studio albums debut at No. 1 on the Billboard 200.