Kelly Clarkson, Meghan Trainor talk 'fuzzy' facial hair. It's a conversation rarely had.

Meghan Trainor likes to get candid on social media — so the TikTok she filmed while shaving her facial hair wasn't out of the ordinary for the star.

What's more rare, though, was the conversation she helped start on how women can grow more facial hair as they age. Frank discussions on the subject like this one can help make those in similar positions feel more comfortable about their own facial hair.

On "The Kelly Clarkson Show" last week, Trainor, 29, and Clarkson, 41, chatted more about the realities of what they called "peach fuzz."

"The older you get, children — I'm like, I'm a peach, right now." Clarkson laughed. "I have so much peach fuzz."

"I’m blonde, so then when I go in the sun, it looks like I'm a Twilight vampire because I glisten. My beard will glisten," she added.

Facial hair and dermaplaning, explained

Trainor talked about shaving before "big important days" and when filming music videos.

"I saw it in 'Lips are Moving,' the music video, they were like, we're gonna do a close up on your lips, and I was like, 'oh, you have a mustache!' Why did no one tell me?" she joked.

Also known as "female face shaving," dermaplaning has many benefits: It can brighten the skin, fade dark spots and soften fine lines and wrinkles.

"While those soft, vellus hairs can be helpful, they also hold onto makeup, dirt, bacteria and a whole bunch of irritants," Cassandra Bankson, a skincare expert and medical esthetician who regularly shaves her face, previously told USA TODAY. "I found that when I dermaplaned my face, my selfies turned out crisper, because the powdered makeup wouldn't hold onto my facial hairs."

Azadeh Shirazi, a cosmetic dermatologist, previously explained a skin-smoothing effect is one of the main benefits of shaving peach fuzz.

"It’s more than just a method for hair removal. It’s a much deeper exfoliation treatment… so removing the dead skin cells allows for better penetration of your skincare products, making them more effective. It also allows for makeup to go on smoother," Shirazi, says.

Clarkson said while talking to Trainor, “I don't (shave) because I'm lazy, but ... I always make the joke, are you gonna shave my beard?"

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Why do some women have more facial hair?

Trainor and Clarkson aren't the only women seeing hair on their faces.

Hair levels are affected by a person's hormones, which can change due to puberty, menopause, pregnancy and a number of other factors.

Women generally tend to retain the finer hairs that look like "peach fuzz," after puberty than men do. Those thin, finer hairs help the body regulate temperature and stay warm.

Women's estrogen levels decrease during menopause, though testosterone production continues. It makes sense, then, that older women may see more of the thicker and longer facial hair more common for men, also called terminal hair.

Facial hair levels can also differ based on a person's genetics and baseline hormone levels. About 5 to 10 percent of women have a common condition called hirsutism, which results in increased terminal hair growth. It's more common in women of Mediterranean, South Asian, and Middle Eastern descent.

Contributing: Jenna Ryu, USA TODAY

Women shaving their faces: Here's why people are talking about dermaplaning.

This article originally appeared on USA TODAY: Kelly Clarkson show: Meghan Trainor inspires real talk about shaving