Gwen Stefani, 55, Floors Fans in 'Stunning' Wrinkle-Free Photos 'Where Is This Fountain of Youth'

Gwen Stefani never ceases to amaze fans with her youthful appearance.

The "Hollaback Girl" singer took to Instagram on Wednesday, Dec. 4, to share a carousel of photos taken backstage at The Voice, and her followers couldn't get over the "stunning" images.

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In the pics, Stefani, 55, posed wearing a long feathered robe over fishnet stockings and a white tank top, accessorizing with turquoise necklaces. Her blond hair was long and straight, with some pulled back from her face.

"@nbcthevoice last night ✨ so excited for @sydneysterlacemusic finals here we come !! gx," the pop star captioned her post.

Related: Gwen Stefani Details "Complete Turmoil" of Initially Dating Blake Shelton

Instagram users were in disbelief over her ageless beauty.

"Stunning ✨️," wrote one fan.

"This look is amazing 😍😍," agreed a second person.

"Excuse me, Mrs. Where is this fountain of youth located. You look amazing, girl! Love love love the new album. 🔥" declared someone else.

"Wow. This is literally hands down, the best pictures I’ve ever seen of you. What a gorgeous woman 🙌❤️," raved another commenter.

Earlier this week, Stefani opened up to Entertainment Tonight about an unfortunate gardening incident.

"It was the weirdest thing," she said. "Blake [Shelton] and I garden, like, on a large scale, and I finally talked him into doing the daffodil bulbs. And they are poisonous. And I knew I'd read about it, but they were like, wear gloves when you plant them, or whatever."

"Well we did these hyacinth bulbs, which we really hadn't done before," Stefani continued.

"I think one of them was, like, rotten, and it was like, leaking. It felt like a hundred ants, like, biting you. I felt like I needed to get on Instagram and be like, by the way, if you're watching me plant these without gloves...like I felt, like, responsible to warn people. Not that they were gonna run out and plant bulbs right then, but, I was freaking out."

"It was a fun learning experience," she added, laughing.

Next: Fans Gush Over Gwen Stefani's Unearthed Photos With "True Love" Blake Shelton