What is the KPop Demon Hunters sing-along event? Nearly two months after KPop Demon Hunters debuted on Netflix, the streamer is inviting audiences to a theater near you for a special sing-along event.

John Travolta, who starred as 'Grease' bad boy heartthrob Danny Zuko, crashed the Hollywood Bowl's sing-along event Friday. He surprised the audience and "Grease" co-stars alike.

Travolta is no stranger to fan sing-alongs, as in 2019, he and Newton-John dressed up as their respective characters during a “Meet n’ Grease” sing-along event in Florida.