Olivia Newton-John launched her "Grease" inspired "Summer Nights" show in Las Vegas
last week with fans, friends and several celebrities in the audience watching the 65-year-old English-born Australian singer and actress perform her classic songs from the 1978 hit film.
"Every vocal was fantastic, and I sang along to every one of them," Marie Osmond told the Las Vegas Sun following the performance
. "I haven’t seen her movie 'Grease' 100 times like some in the audience claimed, but definitely a few times. I know all the words to 'Summer Nights.'"
The limited singing engagement was being performed at the Donny and Marie Showroom at The Flamingo, where Newton-John will perform five shows per week until early May, the Daily Mail reported
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"I wanted her to feel very welcomed to our showroom. She was absolutely great — a pitch-perfect performance," Osmond added.
Other celebrities in attendance at the opening night performance were Joey Lawrence, RuPaul, and Dot Jones.
On person who was not at the show was Newton-John's former "Grease" co-star John Travolta, though the "Summer Nights" headliner told Fox News
before the show that she'd "be up for [a reunion with Travolta] if he turns up."
According to Newton-John, Travolta had sent her a personal congratulatory message for the show, Fox News noted.
"For me it's about the music. If it's a great song then it's going to sell itself anyway," Newton-John told Fox News. "People are here to have fun and they're from all different walks of life and different countries and it's always a different experience."
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The Las Vegas announcement is good news after a difficult 2013 for the Australian singer, who lost her older sister, Rona Newton-John, to brain cancer last May
, at the age of 70.
"I will miss her forever — my beautiful, smart, talented, funny, brave sister Rona," the 65-year-old actress said at the time.
A breast cancer survivor herself, Newton-John’s support for her sister had led to her postponing a prior Las Vegas show that had been scheduled for April of last year.
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