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.