We’ve got chills, and they’re multiplying! This weekend, Grease costars John Travolta and Olivia Newton-John made all their fans’ dreams come true when they came together for three sing-along screenings of their iconic film, 41 years after its original 1978 release.

John and Olivia announced the special screenings back in October, after John got fans buzzing earlier in the year by teasing that the former costars were “trying to do something together.” That “something” finally came to life with the Meet ’N’ Grease sing-alongs, where die-hard fans got the chance to celebrate Grease at three massive Florida viewing parties.

Throughout the weekend, both John and Olivia took to Instagram to post about the events. On Friday, for example, John shared a whole gallery of snaps and clips from the first Meet ’N’ Grease screening in West Palm Beach:

The roundup of pictures and videos showed John and Olivia walking hand in hand with their full Grease costumes, getting excited about the crowd, and walking out onstage to an eruption of cheers. All fans could seem to notice, however, was one thing: John’s hair.

For about a year, John has rocked a bald, shaved-head look full time, so the head of hair he sported for the screenings seemed to take his followers by surprise: “Where did you borrow the hair from?” one fan commented. “How did you grow hair,” another joked. “He has his hair back and he looks the same,” wrote a third.

Of course, it seems safe to assume that the hair John sported at the screenings was a wig, as just earlier this month, he was making TV appearances with a completely shaved head. And besides, real hair or not, John still totally rocks the Danny Zuko look all these years later, as was evidenced by the many compliments he also received from fans in the comment section.

“John, you are just as GORGEOUS as back then!!!” one fan commented on his post. “Danny, you’re cooler than ever!” wrote another.

At the end of the day, fans seem to be ecstatic that the costars took the time to reunite and celebrate the film and that their friendship still seems as real and strong as it did back in the ’70s. Perhaps John said it best in his Instagram caption: “Grease is still the word.” Indeed it is.