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.

John Travolta revived one of his most iconic characters over the weekend, surprising crowds at the Hollywood Bowl with a cameo as Danny Zuko in the venue's singalong "Grease" event June 27.

John Travolta made a surprise appearance at Friday night’s “ Grease ” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko.

John Travolta surprised fans at the Hollywood Bowl Grease sing-along, reprising his iconic Danny Zuko role with a stylish blond wig ...

John Travolta made a surprise appearance at Friday night’s “Grease” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko. “Tonight at ...

Screen icon John Travolta made a surprise appearance at a "Grease" sing-a-long at the Hollywood Bowl this weekend.

John Travolta is hopelessly devoted to Danny Zuko. The “Grease” star from New Jersey made an unscheduled visit Friday to a Los Angeles event dedicated to the 1978 movie. “Tonight at the ...

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.

Fans at the 'Grease' Sing-A-Long screening at the Hollywood Bowl last night got a surprise when the original Danny Zuko strutted out onstage.

John Travolta gave "Grease" fans the thrill of their lives when he dressed up as Danny Zuko for a surprise appearance at a screening of the hit 1978 movie musical. The 71-year-old actor shared a ...