At the open of a Billie Eilish concert, a giant light box rises in the arena. "Spoiler alert! I'm in the cube, but you can't see me," she said. "I can literally see everybody so well from inside ...

Wheelchair storage is available for guests ... The CHI Health Center will have vegan options during the Billie Eilish show, including vegan burgers, vegan quesadillas, and falafel sandwiches.