When I went in the first day, Billie Joe [Armstrong, the lead singer] had taken pictures of everyone with his iPhone, had drawn big X's over their eyes, and had pinned them up on the wall. I ended up really liking that idea. That was our starting off point, these graffiti'd pictures that he had done. [...]

In keeping with the quick and dirty style of the record -- as opposed to it being a big, orchestrated rock opera -- we didn't go with a big photo shoot for the covers. Everyone shot their own photos with their iPhones. All three of those photos were taken by Billie Joe, Mike [Dirnt], and Tré [Cool]. They took them themselves and texted me their photos. It just kept with the spirit of the record. It was very DIY, lo-fi, and fun