5 Seconds of Summer just dropped their music video for "Old Me," and we'd be lying if we said we're not a little bit emotional. While the lyric video is basically a scrapbook of photos [1] of Luke Hemmings, Michael Clifford, Calum Hood, and Ashton Irwin when they were little kids, the video takes "nostalgia trip" to another level. As the band sings on a moving train, each new door showcases their journey together throughout the years. There are even a few ghosts from their past on the train, including a subtle nod to their days with One Direction. If you're a longtime fan, try not to cry as you watch the video above.