Animated musical “KPop Demon Hunters” generated an estimated $18 million to $20 million in ticket sales during a two-day sing-along run in about 1,750 U.S. and Canadian cinemas, according to rival studio tracking. The tally, achieved without participation from the AMC chain, gave the picture the weekend’s top slot ahead of Warner Bros.’ horror release “Weapons” and marks the first time a Netflix original has led the North American box office. The limited theatrical victory caps a surge in streaming popularity. Since its 20 June debut on Netflix, the film has been viewed 236 million times, eclipsing “Red Notice” to become the service’s most-watched original movie, the company said. Music from the film is amplifying the phenomenon. Led by Huntr/X’s single “Golden” at No. 1, four songs from the soundtrack simultaneously occupy the Billboard Hot 100’s Top 10—an unprecedented result for a soundtrack and the first instance of three tracks in the Top 5 since “Saturday Night Fever” in 1978. Produced by Sony Pictures Animation under a pre-existing licensing pact with Netflix, the movie’s crossover success in theaters, on the platform and on music charts has prompted the two companies to begin early discussions about a sequel, according to people familiar with the talks.