We're so excited for the guys of 5 Seconds of Summer, because they're celebrating the three year anniversary as a band today! We can't believe how much the guys have changed over the years, while always staying true to their own styles.
It just so happens to be Transformation Tuesday, so we thought it would be amazing to look back on how far the guys have come since their first days as a group. (Spoiler alert: many shocking Michael Clifford and Ashton Irwin hair changes ahead!)
Click through the gallery above to watch the guys transform before your eyes. Then, wish them a happy bandiversary in the comments section below!