Members - 5SOS. Luke Hemmings is the youngest member of 5 seconds of summer by a few months (Age 17), and in the band, he is on bass guitar and vocals. Calum Hood is the second youngest member of 5 seconds of summer (a few months older than Luke).
Unlike many fandoms, fans of 5 Seconds of Summer do not have a name. Instead, we are called the 5SOS Fam, and true to the name, we are like a family. There is such a strong sense of community within our fandom, as people from all over the world come together to share their love for the band and the music.Aug 18, 2015