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.

John Travolta made a surprise appearance at a “Grease” sing-along at the Hollywood Bowl dressed up as his beloved character, ...

Travolta surprised fans and his original co-stars with a special appearance at the Hollywood Bowl. John Travolta as Danny ...

John Travolta, aged 71, made a surprise appearance at the Grease sing-along night at the Hollywood Bowl, stepping into the ...

Child reportedly fell overboard on Disney cruise. Her dad jumped in after her. Danny Zuko Returns: John Travolta Surprises ...