Video: John Travolta Surprises Fans as 'Danny Zuko' at GREASE Sing-Along

Grease fans got a a big surprise at the Hollywood Bowl on Friday night, where they gathered for a special sing-along of the beloved film. Original 'Danny Zuko' himself, John Travolta, took to the stage dressed in T Birds attire. He wrote on Instagram: "Tonight at the Hollywood Bowl, for the first time I surprised everyone at the GREASE Sing-A-Long and dressed up as Danny Zuko. No one knew. Not even the cast. Thank yo…

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