Phish is performing four unique shows inside the $2.3 billion Sphere in Las Vegas, becoming the first band to perform at the glitzy concert venue since U2 ended a 40-show residency in March. The band's co-founder Trey Anastasio promises no repeated songs and new visuals each night — plus a theme for fans to figure out. He sat down with the AP's Josh Cornfield to talk about how how the shows came together, pushing forward creatively — and what's next for the group. #phish #treyanastasio