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.

Tell us about it, stud. 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 ...

You never know what’s going to happen on those summer nights at the Hollywood Bowl. On Friday night, the iconic venue hosted the “Grease” sing-along screening. The event reunited the film ...