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Sandy and Frenchy Hold Mini Grease Reunion at Olivia Newton-John's Las Vegas Show

When they sang “Chang chang changitty chang shoo-bop, we’ll always be together” they meant it.

On Saturday, Grease’s Sandra Dee and Frenchy reunited for one more hand jive. Didi Conn, 63, who played Frenchy in the 1978 movie musical, surprised the audience at Olivia Newton-John’s Las Vegas show “Summer Nights” by joining Grease’s leading gal on stage.

RELATED: See our Picks for a Grease fantasy cast

Hand Jive Hopefuls: Bruno Mars and Taylor Swift Lead Our Live-Action Grease Fantasy Cast

Grease must be the way we are feeling, because the musical is making a comeback.

After appearing on Broadway and the silver screen, the T-Birds and Pink Ladies are set to hand-jive onto TV sets. Fox has revealed plans to air a live-action version of Grease next year.

Live Grease Musical Coming to Fox in 2015

Here’s some news to make your approaching summer nights a blast.

Fox is bringing a live-action version of Broadway musical (and film) Grease to the small screen sometime next year.

The move is, in all likelihood, motivated by NBC’s success with their own live musical version of The Sound of Music, which – including DVR playback – tallied almost 22 million viewers last fall.

Olivia Newton-John to Headline Las Vegas Show

Grease star Olivia Newton-John is headed to Las Vegas.

The 65-year-old singer and actress announced a headlining residency Tuesday. She will perform 45 shows at the Donny and Marie Showroom at The Flamingo, starting April 8. Dates are scheduled through the summer.

From Bing to Bieber, Listen to the 10 Strangest Holiday Duets of All Time

As any Hallmark card can tell you, the holidays are about bringing people together. For some of us, that means reuniting with grown-up children, or welcoming long-lost cousins into our homes. But for musicians, it means something else: seasonal duets, often performed with the oddest of partners.

Olivia Newton-John's Sister Rona Dies

Olivia Newton-John’s beloved older sister, Rona Newton-John, has died after a battle with brain cancer.

“My beautiful sister Rona sadly passed on May 24th in Los Angeles. It was May 25th in Australia – which was our mother Irene’s birthday,” Olivia, 64, wrote on Facebook.

John Travolta & Olivia Newton-John Release Grease-Inspired Video

To many, John Travolta and Olivia Newton-John will always be high school loves Danny Zuko and Sandy Olsen from the 1978 hit Grease. Now, the two have reunited for a holiday album – and a Grease-themed video.

PI Tracking Down Olivia Newton-John's Missing Boyfriend

Olivia Newton-John’s onetime boyfriend, who disappeared in 2005 and was presumed to have drowned at sea, may be alive after having faked his own vanishing act, according to a private investigator hired by Dateline NBC.

Former cameraman Patrick McDermott apparently slipped out of sight to escape debts and let his son cash in a $100,000 life-insurance policy, believes investigator Philip Klein.

Olivia Newton-John: Get Well Soon, Christina Applegate

Olivia Newton-John, a breast-cancer survivor who feels “an instant rapport” with others who have the disease, says she is thinking of Christina Applegate and planning to connect with the Samantha Who? star during her time of recovery.

“I haven’t met her yet, but I’ve always liked her and admired her as an actress and would like to just say ‘Hey,’ so I will,” Newton-John told PEOPLE at Project Angel Food’s Angel Awards in Los Angeles on Saturday.