One might think Olivia Newton-John could be slightly burned out on her own song catalog, but she’s never really stopped singing her hits or appreciating how they have opened doors for her. She doesn’t have to tour, and with a home in Jupiter, Fla., as well as a cancer treatment center and health retreat occupying her interests in her native Australia, is there really any room or reason for taking on a Las Vegas residency at the Flamingo?

“The idea of being in one place and being able to sleep in the same bed, and to be able to have my dog and my husband—not necessarily in that order, but for them to definitely be there so we can have family time is very appealing to me,” she said in a phone interview from L.A. “And then, it’s really interesting, I’ve noticed friends that won’t drive two hours for a concert of mine will fly five hours to go to Vegas. So it’s a real destination for people, and they love to come, I’ve discovered, and that’s great.”

It is also a place her older sister, Rona Newton-John, liked to visit as well. The singer had planned to perform in Vegas for an extended visit before her sister fell ill, eventually succumbing to brain cancer nearly a year ago. “I didn’t think I was going to do it. I decided she would want me to,” said Newton-John, herself a survivor of breast cancer. “She loved Vegas. That was her fun place. We used to go shopping and do sister stuff there. So it always feels like she’s with me and I know she wants me to get going and do it.”

Newton-John’s longtime band will join her in the Donny & Marie Showroom, where they will back her on an evolutionary journey through her recording career reaching as far back as “Let Me Be There” and “I Honestly Love You.” “This show is really an evening with me and my music. It’s not a big production,” she said. “I’ve really always been about just my music because I’ve been very lucky. I’m very grateful to have had wonderful songs in my career, and those songs have maintained.”

So the singer, who also tends to the Olivia Newton-John Cancer and Wellness Centre in Melbourne, Australia, as well as her Gaia Retreat & Spa in New South Wales, will literally let the music tell her story. “I’ve had many different styles of music. I started out in country, much to my amazement, and I went from that to pop,” she says. “I did Grease, which opened up a whole new door for me, and Xanadu, and then I did (the albums) Physical and Totally Hot and things like that that were different than people would expect, so it’s been an evolution of music, and that’s what I will do.”

And, of course, if John Travolta shows up, there will be a microphone and an invitation to duet. Hey, it could happen.

Flamingo, 7:30 p.m. April 8-12, $69-$139 plus tax and fee. 702.777.2782