When you invest your time devoted to a band, you spend years following the group's every album, music video, tour and even Instagram selfies. You literally watch them grow up right before your very eyes and over the years, their personal styles change, but most importantly they stick together through it all.
5 Seconds of Summer recently recreated one of their throwback photos, and besides the fact that they nailed the pose, it's shocking to see how much the guys have transformed. Since this pic gave us all the feels — because how could it not?! — we decided to compile more then-and-now photos of more bands, like One Direction and Fifth Harmony that will have you taking a full-on trip down memory lane.
Click through the gallery to see more bands' transformations. Then tell us in the comments which one surprised you the most!