John Travolta Surprises 'Grease' Sing-A-Long at Hollywood Bowl

Imagine you went to a special movie night where everyone sings along to 'Grease'!

Suddenly, the original Danny Zuko, played by John Travolta, showed up!

He surprised everyone, even the people already on stage.

Wearing a blond wig, he walked out and the crowd went wild, giving him a big round of applause.

He then led everyone in singing a famous part of a song from the movie.

It was a super fun night, and nobody knew he was going to be there!