At 58, Twain opened up about noticing changes in her body as she continues her decades-long career. The country music star is currently performing in Las Vegas at her Planet Hollywood residency, "Come On Over."

"I decided that wherever there was a mirror, and I was naked in my house or hotel, that I would keep the lights on and look in the mirror," Twain told The Sun's Bizarre columnist Jack Hardwick.

"A lot of people as they start aging — and even young people — don’t want to look at themselves in the mirror naked, and I think that is such a shame."

Twain isn't afraid to see "another sag" or cellulite.

"Every month or day that I may notice another sag or another bit of cellulite, I want to know it’s there," she explained. "I want to be OK with it instead of thinking I have to cover it up or not look. I can’t change it, and I don’t plan on changing it superficially."

The "You're Still The One" singer previously revealed her pre-show routine: an all-liquid diet. "If I eat any solids hours before the show, I’ll have to burp," Twain previously told People magazine. "It’s just a nightmare because you have to sing around the burp, and it's distracting in itself. So I usually don't eat any solids at all on show days until after the show, only liquids."

Twain also follows an intense exercise routine, much like an athlete. "I am an athlete. I have to breathe, I have to project," she told The Sun. "I have to pace everything."

Twain hasn’t always been confident about her body. "I’ve been very shy about my body from a very young age… to the point where I would not go to the beach in a bathing suit," she previously told "Extra." "I was probably really tortured by it from the age of 10."

Reflecting on her career, Twain spoke about landing her first hit song, "You're Still the One," released in 1998. "I was 30 when I had my first radio hit. In that video, I’m braless, I’m stepping out of my daily self into this world of video-making and making decisions that give me this freedom to do things I wouldn’t normally do in my daily life," Twain told Extra.

In the interview, Twain also touched on the importance of self-acceptance and embracing one's natural appearance. "It’s empowering to accept yourself as you are. Aging is a natural process, and I want to embrace it with confidence," she said. "I hope my journey can inspire others to love themselves and not feel pressured to conform to unrealistic standards."

Shania Twain continues to be a role model for many, showing that confidence and self-acceptance are key to living a fulfilling life.