Luke Hemmings (lead vocals, guitar) Michael Clifford (guitar, vocals), Calum Hood (bass guitar, vocals), and Ashton Irwin (drums, vocals) collectively are 5SOS. . Many people have heard of the band, but few fans are familiar with the personalities of each individual member. In this exclusive documentary we get "UP CLOSE & PERSONAL, " revealing the true dynamic of 5 Seconds of Summer.