Calum Hood and Luke Hemmings have been best friends since as far back as they can remember. Along with Ashton Irwin and Michael Clifford, the four of them are inseparable. However, it is safe to say Luke and Calum have been through the most together. From Luke's parents divorcing, to Cal suffering a horrible injury after a soccer match, and even when they decided they wanted their careers to do something with music. Nothing could ever come in between them, right? Well, nothing except for her.