LAS VEGAS — “Grease” star Olivia Newton-John is keeping her “Summer Nights” show at the Flamingo Las Vegas casino-hotel through September.

Flamingo owner Caesars Entertainment announced Tuesday that the performer’s residency had been extended.

The 66-year-old singer and actress is adding 70 performance dates to her calendar starting March 3 through Sept. 12, 2015.

The show features hits from her 1978 starring turn in “Grease” the musical such as, “You’re the one that I want,” as well as songs from “Xanadu” and her solo pop career, including “Physical.”

Tickets go on sale Friday starting at $70.

And to get you through your Wednesday: