Madonna, BTS and more co-headlined an inaugural World Cup halftime show that took a maximalist approach to spectacle.

Madonna, Shakira, BTS and Justin Bieber will headline the first-of-its-kind event Sunday, a charity fundraiser. See when to tune in and how long it will last.

"The expected viewing figures on Sunday are going to be enormous, like probably the most viewed match of all time," Guy Carrington says.