John Travolta & Olivia Newton-John Announce 'Grease' Sing-A-Long Amid Her Cancer Battle

Jeff Mazzeo

You better shape up because John Travolta and Olivia Newton-John are getting back together for a "Grease" sing-a-long.

Travolta announced on Instagram that Newton-John and he are participating in "Meet n Grease Movie Sing-a-long with Danny and Sandy" in West Palm Beach, Florida next month.

"Join me and Olivia Newton-John for the “Meet ‘n’ Grease” Movie sing-a-long!" Travolta wrote in the caption of his post. "Dress up, sing-a-long with film, and join Olivia and I for a special Q&A."

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Her Battle With Cancer

The event is great news for fans because Newton-John has been open about her battle with stage 4 cancer.

Back in August, she sat down with "60 Minutes Australia" and revealed that her cancer is back and more aggressive than ever.

"I'm so lucky that I've been through this three times and I'm still here," Newton-John told "60 Minutes Australia."

The "Grease" star said she's trying to keep a positive outlook and is going to live her life to the fullest as she is battling the deadly disease.

"We know we're gonna die at some point, and we don't know when it is. When you're given a cancer diagnosis or a scary honest diagnosis, you're suddenly given a possibility of a time limit," Newton-John said. "So every day is a gift."

Travolta Has Kind Words

Travolta had kind words for his "Grease" co-star a few months ago and expressed how proud he is of her.

"She looks incredible," Travolta told ET, "She doesn't look any different than years ago and I'm very proud of her."