Transcript for Celine Dion says she feels 'stronger, more beautiful' and 'more grounded' than ever
��� ��� Reporter: Celine Dion has been hitting this song's high notes for more than 15 years. Her music so timeless. Just weeks ago the singer surrendering her microphone to this young fan in Vegas. The moment going viral. ��� Because I surrender everything ��� Reporter: Maybe it's the superstar's super power, sharing her bright spotlight. Now beginning a new journey in her 50s. You're in the 50 club. Welcome aboard. I feel beautiful, stronger, more grounded. There's this power and strength that comes with that maturity and that vintage thing. Reporter: That vintage thing? That's priceless. Reporter: She says she's feeling more alive than ever. The unmistakebling voice behind hits like "All coming back to me now." And her latest, "Ashes" from the film "Deadpool 2." Celine's redefining her image, suddenly a Paparazzi darling and fashion plate. Breaking the internet after appearing in the fashion week in that titanic sweatshirt. The movie made iconic by her soulful hit "My heart will go ��� there's nothing I fear ��� Reporter: And white pantsuits a nod perhaps to her most famous fashion moment at the oscars all those years ago. Now at 51, Celine's also the latest spokes person for the L'Oreal Paris. I'm a woman and we're worth it. Reporter: What's your secret these days to staying healthy and fit and happy? Don't need to prove myself to the industry. To my family, to my friends. Because I think I've done it for many years. Reporter: There are some who worry that you're a little too thin. What do you say? It's true that I'm a little thinner. Everything's fine. Nothing's wrong. I have discovered a new passion. Reporter: A true renaissance woman, discovering that life is going on. Three years after losing the love of her life, husband Renee, to cancer. Did you expect that you would be at this point, three years later that you would really sort of be in charge and really feeling strong again? Strong again, yes. When, I don't know. But, to be honest, I did not know that I was going to be with time feeling better. Reporter: Learning to move forward was difficult at first. But Celine's regaining her confidence, even taking on bold new projects. Is that the advice you give to anybody else who may have gone through loss? You can not stop living. Today is the first day of the beginning of my life. Because I know that I don't have to worry. ��� You were my strength ��� Reporter: Renee was by her side for more than 30 years. First as her manager. Husband. The inspiration behind those unforgettable classics. A love story for the ages. We were with her as she comforted him through the final days. He's got a feeding tube. I have to feed him three times a day. Reporter: Do you this I do this myself. Reporter: After a grueling three years, Renee Ros his battle with throat cancer. Renee Charles 15, and twins 5 at the time. I spoke with Celine again in 2016 after the funeral. To me, for me it's like I don't live with him physically, but I live with him inside of me. Reporter: Being a single parent was never in her dreams. But the singer is managing. I will never be a dad. But it's like I'm on a doubling shift. Doubling job as a parent. So I'm a parents. Reporter: You're the real deal. I'm the big deal. And the kids are growing, and I see them. And I look at them. I'm like, we've done a great job. And I'm so proud. Reporter: And kids are good? They're amazing. And Renee Charles? He's amazing. Teenager years can be sometimes challenging. Reporter: Yes. And I let him fly on his own. He's mature enough to foe that he's always have somebody in the back protecting him. But lately he said, you know, mom, you were right about things. But when a 18-year-old looks at you and says, mom, you were right. Reporter: You've done your job. I will never forget this for the rest of my life. Reporter: For years now, Celine has called Las Vegas home. Her eight-year residency at Caesar's palace allowing for family stability after decades of touring. Now that journey is about to end. What do you think will feel like? Bittersweet. I raised my kids here. It's pretty hard to believe I have been here for that long. Many things happened during that journey. Sadness, happiness. Loss. Reporter: I watched the show the other night. And I experienced it emotionally. Knowing the journey that you've taken. In the 50s, I told you. ��� ��� Reporter: With a newfound sense of self, Celine Dion is centered again. Her heart fully open, she says, to whatever life is ready to offer. Are you ready for love again at some point? I am in love. You don't see it? Love is not necessarily to marry ��� ��� I go on stage every night because I love what I do. So I'm very much in love. Reporter: For "Nightline," I'm Deborah Roberts in las Vegas.
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